When we can see well, we do not think about our eyes very often. It is only when we cannot see perfectly that we come to see how important our eyes are.

    People who are nearsighted can only see things that are very close to their eyes. Many people who do a lot of close work, such as writing, reading and sewing（缝纫）, become nearsighted. Then they have to wear glasses in order to see distant things clearly.

    People who are farsighted（远视的）suffer from just the opposite problem. They can see things that are far away, but they have difficulty reading a book unless they hold it at arm's length. If they want to do much reading, they must get glasses too.

    Other people do not see clearly because their eyes are not exactly the right shape. This, too, can be corrected by glasses. Some people's eyes become cloudy because of cataracts（白内障）. Long ago these people often became blind. Now, however, it is possible to operate on the cataracts and remove them.

    When night falls, colors become fainter to the eye and finally disappear. After your eyes have grown used to the dark, you can see better if you use the sides of your eyes rather than the centers. Sometimes, after dark, you see a small thing to one side of you, which seems to disappear if you turn you head in its direction. This is because when you turn your head, you are looking at the thing too directly. Men on guard duty sometimes think they see something moving to one side of them. When they turn to look straight at it, they cannot see it any more, and they believe they were mistaken. However, this mistake happens because the center of the eye, which is very sensitive(敏感的) in daylight, is not as sensitive as the sides of the eyes after dark.

    When it comes to the Internet, people talk about the password most. Actually, it's been under fire for a long time. Research has shown that passwords are not a very good way to protect sensitive information.

    People would use some random characters, numbers and symbols. Furthermore, a unique password would be used for every site or application the user uses. Unfortunately, the longer and more complex passwords become, the more people are likely to forger them. Therefore, they use the same password for every service or application. These are all big no-noes and essentially defeat the purpose of a password.

    Google is trying to kill off passwords on Android devices by introducing the Trust API, which does what simple passwords cannot and gives developers a framework for securing their application using a number of security systems and metrics(衡量标准)on the device. A Trust Score will be generated based on a number of metrics including your device location, face scanning, fingerprints, and the things like your typing speed or the way you speak. Taken one at a time, these metrics are not secure. But taken together, these metrics will help recognize the real “you”.

    The good news is that Google has already been testing this on real world data. Google has proven the Trust API works. Next Google will run tests will some banks to see if the Trust API meets their needs before rolling out the system on Android phones later. It may take another year for apps and popular sites to start using the Trust API.

    This is a pretty exciting change. Passwords have been around for a lone time. Although the security of systems has been improved, the usability of systems hasn't been proved much. Google appears to have the best of them. Maybe that never-ending conflict between security and convenience will be able to take a break once the Trust system comes out.

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    I was living a life in my screen and hardly noticed what was around me. So when my friends invited me to go camping for a long weekend without the cell service, I thought this was exactly what I needed. Here's how keeping away from my phone for 48 hours changed me.

    I realized my bedtime routine was usually centered on one thing: my phone. Right before I went to sleep, I browsed through news websites and checked my emails. When I woke up in the middle of the night, I did the same thing. The problem with this was I felt anxious every night. I felt free without my phone at that weekend camp. I felt asleep listening to the sound of crickets.

    When I had my phone, I was always checking the time and thinking of future plans. My thought was: “Who's going to text me now? What will I do next?” Without my phone, I truly savored what I was doing in the moment, sitting by the river, riding a bike, or singing the old songs. There was no need to rush through any of it. I listened to what my body wanted instead of what my phone was telling me to do.

    You know that moment when you're hanging out with a group of people and no one has anything to say? The typical response: Everyone immediately pulls out their phones. So what did we do without a phone to avoid embarrassing silences? We actually talked to each other. Instead of burying our faces in our screens, we looked one another in the eye, had a moment of pure human connection and then continued talking. And you know what? People actually listened.

    So, now what? Now I'm back to the real world.

    They say if you love your job, you'll never work a day in your life. We say if you travel for work, you'll never have a boring commute(上下班往返) a day in your life. If the typical 9-to-5 isn't working for you, here are some options that will pay you to travel. No matter your current skill set, you can probably do it somewhere else.

Represent abroad

    The State Department is actively hiring Foreign Service Officers, and it's probably easier than you think to become one. You'll have to a lot of tests, but if you pass, you'll spend the next years of your life working around the world. A Junior Foreign Service Officer starts at $71,000 a year.

    Teaching English as a Second Language abroad is one of the best ways to deepen understanding of another culture. There's no need to be a certified English teacher in order to go abroad. In this program in China, soon-to-be teachers go abroad to obtain their Teaching English as a Foreign Language(TEFL) certifications. A beginning teacher in China will earn $2,500 for working six months, plus room and board.

    A cruise ship is a floating village. Therefore, any job that you could have in a village you could have onboard a ship-even auctioneering(做拍卖师). Carnival is hiring an art auctioneer to work aboard a luxury cruise ship. The only qualifications necessary are a college degree and public speaking skills. Going…going…sold.

Write the rails

    Writers can reimagine themselves as rail-surfing Jack Kerouacs, crossing the country and writing from coast to coast on the Amtrak Writer's Residency. The application process consists of two questions, as well as the opportunity to provide up to a 20-page writing sample. Amtrak will select 24 writers to participate in the program with the help from a panel of judges. Although the project won't replace a full-time job, it's really a fun opportunity. The application period for 2016 has closed, but applications will reopen in the fall.

    About twenty of us had been fortunate enough to receive invitations to a film­studio (影棚) to take part in a crowd­scene. Although our “act” would last only for a short time，we could see quite a number of interesting things.

    We all stood at the far end of the studio as workmen prepared the scene，setting up trees at the edge of a winding path. Very soon, bright lights were turned on and the big movie­camera was wheeled into position. The director shouted something to the camera operator and then went to speak to the two famous actors nearby. Since it was hot in the studio, it came as a surprise to us to see one of the actors put on a heavy overcoat and start walking along the path. A big fan began blowing tiny white feathers down on him, and soon the trees were covered in “snow”. Two more fans were turned on，and a “strong wind” blew through the trees. The picture looked so real that it made us feel cold.

    The next scene was a complete contrast (对比). The way it was filmed was quite unusual. Pictures taken on an island in the Pacific were shown on a glass screen (幕). An actor and actress stood in front of the scene so that they looked as if they were at the water's edge on an island. By a simple trick like this, palm trees, sandy beaches, and blue, clear skies had been brought into the studio!

    Since it was our turn next，we were left wondering what scene would be prepared for us. For a full three minutes in our lives we would be experiencing the excitement of being film “stars”！

    The Guggenheim Museum attempts to help educators connect students with art. It offers programs for educators, including free arts curricula, professional development courses and workshops, as well as professional meet-and-greets that pair artists with public school teachers throughout New York City.

    •Visiting with your students

    The museum offers a variety of ways for educators and their students to visit, from self-guided tours to a guided experience.

    •Arts curriculum online

    The Guggenheim produces free curriculum materials on exhibitions for educators to use both during school visits and in the classroom. While the material focuses on recent exhibitions, a comprehensive range of lessons cover many works and artists in the museum's collection.

    •Learning Through Art

    Learning Through Art sends experienced teaching artists into New York City public schools, where they work with classroom teachers to develop and facilitate art projects into the school curriculum.

    •Education facilities

    Housed in the Sackler Center for Arts Education, the Guggenheim's education facilities include studio art and multimedia labs, a theater, an exhibition gallery, and a conference room.