Transparent animals let light pass through their bodies the same way light passes through a window. These animals typically live between 

the surface of the ocean and a depth of about 3,300 feet—as far as most light can reach. Most of them are extremely delicate and can be 

damaged by a simple touch. Sonke  Johnsen, a scientist in biology, says, “These animals live through their life alone. They never

touch anything unless they're eating it, or unless something is eating them.”

And they are as clear as glass. How does an animal become see-through? It's trickier than you might think.

      The objects around you are visible because they interact with light. Light typically travels in a straight line. But some materials slow and

 scatter(散射) light, bouncing it away from its original path. Others absorb light, stopping it dead in its tracks. Both scattering and absorption

 make an object look different from other objects around it, so you can see it easily.

But a transparent object doesn't absorb or scatter light, at least not very much, Light can pass through it without bending or stopping.

That means a transparent object doesn't look very different from the surrounding air or water. You don't see it —you see the things

behind it.

   To become transparent, an animal needs to keep its body from absorbing or scattering light. Living materials can stop light because they

contain pigments(色素) that absorb specific colors of light. But a transparent animal doesn't have pigments, so its tissues won't absorb

 light. According to  Johnsen, avoiding absorption is actually easy. The real challenge is preventing light from scattering.

Animals are built of many different materials—skin, fat, and more—and light moves through each at a different speed. Every time light

moves into a material with a new speed, it bends and scatters.Transparent animals use different tricks to fight scattering. Some animals are

simply very small or extremely flat. Without much tissue to scatter light, it is easier to be see--through. Others build a large, clear mass of

 non-living jelly-lie(果冻状的)material and spread themselves over it .

    Larger transparent animals have the biggest challenge, because they have to make all the different tissues in their bodies slow down light 

exactly as much as water does. They need to look uniform. But how they're doing it is still unknown. One thing is clear for these larger animals, staying transparent is an active process. When they die, they turn a non-transparent milky white.

    Sports can help you keep fit and get in touch with nature. However, whether you are on the mountains, in the waves, or on the grassland, you should be aware that your sport of choice might have great influence on the environment.

    Some sports are resource-hungry. Golf, as you may know, eats up not only large areas of countryside, but also tons of water. Besides, all sorts of chemicals and huge amounts of energy are used to keep its courses(球场) in good condition. This causes major environmental effects. For example, in the dry regions of Portugal and Spain, golf is often held responsible for serious water shortage in some local areas.

    There are many environment-friendly sports. Power walking is one of them that you could take up today. You don't need any special equipment except a good pair of shoes; and you don't have to worry about resources and your purse. Simple and free, power walking can also keep you fit. If you walk regularly, it will be good for your heart and bones. Experts say that 20 minutes of power walking daily can make you feel less anxious, sleep well and have better weight control.

    Whatever sport you take up, you can make it greener by using environment-friendly equipment and buying products made from recycled materials. But the final goal should be "green gyms". They are better replacements(代替物) for traditional health clubs and modern sports centers. Members of green gyms play sports outdoors, in the countryside or other open spaces. There is no special requirement for you to start your membership. And best of all, it's free.

    If you feel like you've been listening to the same three songs on a loop（循环地）, maybe it's time to discover some new songs. With these apps (almost all of which are free, by the way) and some patience, you might just find your new favorite songs:

Indie shuffle

    Allows you to browse through lesser-known artists' music based on genre（类型）, release date and various other categories（类别）. You can save songs or artists you like and find bands with similar sounds.

Rormix

    Rormix searches your music library to find out what genres and artists you already listen to. Based on its findings, the app suggests music videos you might like just as much. It's an easy way to find new artists without getting too far away from the genres you know and love.

Band of the day

    Provides you with new lesser-known artists and groups to listen to every single day! Download the app, turn on notifications, and you'll get a daily recommendation.

Bandsintown

    If you live for live music, Bandsintown will automatically download your library and suggest concerts you might like based on that list. If a new concert is announced in your area, you will get an automatic e-mail with the details. Basically, you will never miss another show. Here is the best part: You can buy tickets through the app.

Soundcloud

    It is the place to find up-and-coming musicians and remixed singles. Anyone can share and ad music, leading to endless possibilities. The app is a streaming（流媒体）service, online community, and creative outlet. For fans, it makes it possible to keep up with your favorite artists' latest releases.

    A punctual person is in the habit of doing a thing at the correct time and is never late for anything.

    An unpunctual man never does what he has to do at the right time. He is always in a hurry and in the end loses both time and his good name. A lost thing may be found again, but lost time can never be got back. Time is more valuable than material things. In fact, time is life itself. An unpunctual person is always wasting his most important things as well as others'. An unpunctual person is always saying unhappily that he finds no time to answer letters or return calls. But the man who really has much to do is very careful of his time. He knows that he cannot finish all his work unless he carefully does every piece of work.

    Being unpunctual is the sign of disrespect towards others. If a person is invited to dinner and arrives later than the time when he should be there, he keeps all other guests waiting for him. Usually this will be thought as a great disrespect for the host and all the other guests.

    Not like a punctual person, an unpunctual one cannot do his duty wonderfully, whether it is public or personal. Imagine how it would be if those who should do important tasks failed to be on time. A man who is known to be unpunctual is never believed by his friends or fellow men.

    Imagine a child standing on a diving board four feet high and asking himself the question:“Should I jump? This is what motivation or the lack of it can do. Motivation and goal setting are the two sides of same coin. {#blank#}1{#/blank#}Like the child on  the  diving  board, you will stay undecided.

    {#blank#}2{#/blank#} More than that, how should you stay motivated to achieve the goal? First, you need to evaluate yourself , your values your strengths, your weaknesses, your achievements, your desires ,etc. Only then should your you're your goals

    You also need to judge the quality and depth of your motivation. This is quite important, because it is directly related to your commitment. There are times when your heart is not in your work. {#blank#}3{#/blank#} So, slow down and think what you really want to do at that moment. Clarity（清晰）of thoughts can help you move forward.

    Another way of setting realistic goals is to analyze your short and long term objectives, keeping in mind your beliefs, values and strengths. Remember that goals are flexible.{#blank#}4{#/blank#} They also need to be measurable. You must keep these points in mind while setting your goals.

    Your personal circumstances are equally important. For example, you may want to be a Pilot but can't become one because your eyesight is not good enough.{#blank#}5{#/blank#}You should reassess your goals, and motivate yourself to set a fresh goal.

    You will surely need to overcome some difficulties, some planned, but most unplanned. You cannot overcome them without ample motivation. Make sure that you plan for these difficulties at the time of setting your goals.

A. This can affect your work.
B. So how should you motivate yourself?

C. However, this should not discourage you.
D. So why should we try to set specific goals?
E. They can change according to circumstances.
F. Motivation is what you need most to do a good job.

G. Without motivation you can neither set a goal nor reach it

The Importance of Learning a Second Language

In today's globalized world, learning a second language has become an essential skill. It offers numerous benefits that can enhance both personal and professional aspects of life. 

{#blank#}1{#/blank#} Through the process of learning a new language, one can gain a deeper understanding of different cultures and traditions. This can lead to greater empathy and appreciation for diversity. 

Additionally, bilingual(双语的) individuals often have better cognitive abilities. {#blank#}2{#/blank#} Studies have shown that they are better at multitasking, problem- solving, and decision- making compared to monolinguals(单语的). This is because the brain is constantly engaged in managing two languages, which strengthens its overall function. 

{#blank#}3{#/blank#} In many professional fields, being proficient in more than one language can open up job opportunities that would otherwise be unavailable. Many companies prefer to hire candidates who can communicate with international clients or partners. 

Moreover, learning a second language can significantly enhance travel experiences. {#blank#}4{#/blank#} Communicating in the local language can lead to more meaningful interactions and a deeper connection with the place and its people. 

Finally, the process of learning a new language itself can be incredibly (不可置信地) rewarding. 

{#blank#}5{#/blank#} This sense of achievement can boost confidence and motivate individuals to tackle other challenges in life. 

Overall, the advantages of learning a second language are clear. It not only broadens one's horizons but also equips them with skills that are valuable in an increasingly interconnected world. 

A. It allows travelers to guide new environments with ease and enjoy genuine cultural experiences. 

B. The effort and devotion required to master a new language can get a strong sense of accomplishment. 

C. Bilingualism can delay the onset of dementia(痴呆症) and other age- related cognitive declines. 

D. One of the most significant advantages is the ability to connect with people from different backgrounds. 

E. Fluency in multiple languages is often associated with higher salaries and better career prospects. 

F. They tend to have improved memory, attention span, and analytical skills. 

G. Another major benefit is the improvement in job prospects and career advancement.