3. 环境健康角度

(1) Now people in growing numbers are beginning to believe that some certain sports contribute directly to our health by giving us some physical exercises。
    现在越来越多的人开始相信体育锻炼能有助于身体健康。

(2) As a matter of fact, travel has become part of our life. This situation is encouraging, for it not only broadens people's minds to the extent which may not be reached previously, but also relaxes them physically, which help people work out mental problems more actively。
    实际上，旅行已经成为我们生活的一个部分，这样的情形是喜人的，因为旅行不仅可以拓宽人们的视野达到之前没有达到的范围，而且还可以在身体上得到放松，这能使人们更加积极的克服心理问题。

(3) Pollution poses a great threat to our existence. =Some of the…are poisonous and dangerous to health。
    污染对我们的生存造成巨大威胁。

(4) Environmental experts point out that increasing pollution not only causes serious problems such as global warming but also could threaten to end human life on our planet。
    环境学家指出：持续增加的污染不仅会导致像全球变暖这样严重的问题，而且还将威胁到人类在这个星球的生存。

(5) …Under considerable pressure from… therefore…will only add to their burden。
   　　在这样的压力之下，所以会增加他们的负担。

(6) I see three kinds of pressure working on people today: pressure from education, family and career. It is easy to blame the school for charging too much money, the family members for the heavy burden, the society for the fierce competition. I think people should relax. It is important for them to keep a good mood under whatever circumstances。
  我能看到今天人们身上的三种压力，教育的压力，家庭和职业的压力。学校所收学费太贵，家庭成员负担过重，来自社会的激烈竞争。我认为人们应该放松，他们他们来说，在任何环境下保持一个好的情绪是很重要的。

(7) Moreover, children will have less time to play and communicate with their peers due to extra studies, consequently, it is difficult to develop and cultivate their character and interpersonal skills. They may become more solitary and even suffer from certain mental illness。
而且，由于要额外地学习，孩子们没有多少时间和同龄的孩子玩耍和交流，很难培养他们的个性和交际能力。他们可能变得孤僻甚至产生某些心理疾病。


4. 合作角度

(1) sth can give students team-spirit and teach them how to cooperate with others. Because in those activities, students usually need to cooperate with others in order to get good achievement。
    　　Sth 可以赋予学生们团队精神，并教会他们学会与人合作。因为在这些活动中，学生通常需要相互合作目的是得到提高。