The production of coffee beans is a huge, profitable business, but, unfortunately, full-sun production is taking over the industry and
bringing about a lot of damage. The change in how coffee is grown from shade-grown，production to full-sun production endangers the very existence of, certain animals and birds, and even disturbs the world's ecological balance.
On a local level, the damage of the forest required by full-sun fields affects the area's birds and animals. The shade of the forest trees provides a home for birds and other special(物种) that depend on the trees' flowers and fruits. Full-sun coffee growers destroy this forest home. As a result, many special are quickly dying out.
On a more global level, the destruction of the rainforest for full-sun coffee fields also threatens(威胁)human life. Medical research often makes use of the forests' plant and animal life, and the destruction of such species could prevent researchers from finding cures for certain diseases. In addition, new coffee-growing techniques are poisoning the water locally, and eventually the world's groundwater.
Both locally and globally, the continued spread of full-sun coffee plantations (种植园)could mean the destruction of the rainforest ecology. The loss of shade trees is already causing a slight change in the world's climate,
and studies show that loss of oxygen-giving trees also leads to air pollution and global warming. Moreover, the new growing techniques are contributing to acidic(酸性的) soil conditions.
It is obvious that the way much coffee is grown affects many aspects many aspects of life, from the local environment to the global ecology.
But consumers do have a choice. They can purchase shade-grown coffee whenever possible, although at a higher cost. The future health of
the planet and mankind is surely worth more than an inexpensive cup of coffee.

    Most people say “yes” much more readily than “no”.

    A friend is moving house this weekend and would like some help, and you agree. But, what you really wanted was a couple of quiet days relaxing at home. Or a roommate spends the entire weekends playing video games and wants to borrow your homework for “reference”. But, you've just finished it after taking a whole day to work hard.

    Many people say “yes” to those kinds of requests. They tend not to consider their own interests and feelings, and are often angry with themselves afterwards.

    Saying “no” requires courage and considerable practice, in fact, according to psychologists.

    “Everyone wants to be liked,” says Gabriel Steinki, a German psychologist. “Saying ‘no' risk losing the affection of the person asking the favor or even a job.”

    The result is that many people say “yes” just for keeping the peace. But experts say this is regrettable. Anyone should have the right to say “no”.

    In fact, rejecting a request can even help to strengthen a relationship because it expresses a true feeling.

    But, for people used to agreeing to every request, changing can be a long and uncomfortable learning process.

    Most people believe that “If I say ‘no', I'll lose the affection of the person. But the affection is important to me.” This way of thinking can be replaced by this “If he only likes me because I always do what suits him, then the price of his affection is too high in the long term.”

    Steinki says the key is talking to the other person to find a mutual(相互的) solution. “One needs to present the situation from one's own point of view, and to suggest how the situation can be dealt with to the advantage of both parties. The other person must have the feeling that his interests are being considered.”

    When the refusal is not accepted, Steinki advises giving the reasons calmly again until the person gets the message.

    I think that a great friend is like a great artist who can change my feeling about life greatly. When I talk about the person who influenced(影响) me most. I must think of my best friend quickly.

    When I was in my university, one of my classmates sat beside me. His name is Wang Tao. He is my unforgettable friend in my life. He is good at study and handsome. Everyone knows that he is a genius(天才) of my university. Besides, he is kind-hearted and is always ready to help others.

    I remembered that my maths was poor at that time, but he was excellent in solving(解决) maths questions. He often got high scores. Since we talked all day long, he was patient and polite to answer my maths questions. Slowly, I made great progress. I passed the examination finally. Then we became friends naturally.

    We know that we live in a society, so we need a lot of friends. There are two kinds of friends, good and bad, bad friend may make our life failed, while good ones make our life successful. To me, Wang Tao is a very good friend. I learned so many lessons from him, and I became more and more excellent.

    We separated three months ago. Now I miss him very much, and I hope that our friendship will continue to be just as strong after we graduate.

    Last week, Donna Strickland was awarded the 2018 Nobel prize for physics jointly with Arthur Ashkin and Gérard Mourou. It's the first time in 55 years that a woman has won this famous prize, but why has it taken so long? We look at five other pioneering female physicists — past and present — who actually deserve the prize.

    Jocelyn Bell Burnell

    Perhaps the most famous snub(冷落): then student Bell discovered the first radio pulsars in 1967, when she was a PhD student at Cambridge. The Nobel prize that recognised this landmark discovery in 1974, however, went to her male supervisor, Antony Hewish. Recently awarded a £2.3m Breakthrough Prize, which she gave away to help under-represented students, she joked to the Guardian: "I feel I've done very well out of not getting a Nobel prize."

    Lene Hau

    Hau is best known for leading the research team at Harvard University in 1999 that managed to slow a beam of light, before managing to stop it completely in 2001. Often topping Nobel prize prediction lists, could 2019 be Hau's year?

    Vera Rubin

    Rubin discovered dark matter in the 1980s, opening up a new field of astronomy. She died in 2016, without recognition from the committee.

    Chien-Shiung Wu

    Wu's "Wu experiment" helped disprove the "law of conservation of parity". Her experimental work was helpful but never honoured, and instead, her male colleagues won the 1957 Nobel prize for their theoretical work behind the study.

    Lise Meitner

    Meitner led groundbreaking work on the discovery of nuclear fission. However, the discovery was acknowledged by the 1944 Nobel prize for chemistry, which was won by her male co-lead, Otto Hahn.