三、环境

　　40. 就我所知，北京因它悠久的历史和丰富的文化而闻名于世。

　　As far as I know, Beijing is famous for its long history and rich culture.

　　41. 我们应该阻止人们砍伐树木。

　　We should stop people from cutting down trees.

　　42. 我们应该尽力阻止动物灭绝。

　　We should do our best to stop animals from dying out.

　　43. 每天做扫除很必要。

　　It’s necessary to do some cleaning every day.

　　44. 这儿有许多可做的，例如，你可以帮助打扫干净城市公园。

　　There is much to do here, for example, you can help clean up the city parks.

　　45. 总之，保护环境对我们来说很重要。

　　In a word, it’s very important for us to protect the environment.

　　46. 为什么不尽早拯救在危险中的动物呢？

　　Why not save the animal in danger as early as possible?

　　47. 我认为回收废纸取代扔掉它更好。

　　I think it’s better to recycle waste paper instead of throwing it away.

　　48. 我认为我们的城市缺少水。

　　I think that our city is in need of water.

　　49. 我想要大家都加入到环境项目中来。

　　I would like everyone to join in the environment project.

　　50. 勿踩草坪对环境来说是有好处的。

　　It’s good for the environment to keep off the grass.

　　51. 我们应该不断关注我们的环境。

　　We should keep on taking care of our environment.