Unit 13 We are trying to save the earth
知识点及练习Section A 知识点1
试图，努力，尝试 使用方法：try to do sth
竭力做某事 try doing sth
尝试做某事try one's best (to do sth
) = do one's best (to do sth
) 尽某人最大的努力(做某事) 短语：try on 试穿 try out 试用，参与选拔 have a try 尝试，试一下 let me try 让我试一下2
the earth 地球，表达世界上独一无二的事物前面要加定冠词 the
短语：on the earth 在地球上 on earth 究竟，究竟3
pollution n
污染，污染物 →pollute v
污染→ polluted adj
被污染的短语：air pollution 大气污染，空气污染 noise pollution 噪音污染 water pollution 水污染4
litter v
垃圾= rubbish = trash 短语：take out the rubbish 倒垃圾 throw rubbish / litter 扔垃圾5
the bottom of… …的底部 the top of … …的顶部6
be full of = be filled with 充斥……7
play a part 参与…；起作用play a part in “在…方面起作用；参与…”，后接名词、代词或动词-ing 形式
cut 短语 cut down 减少，把……砍倒 cut in 插话 cut off 切断；断绝cut up 切碎cut out 删除9
instead of 介词短语，后跟名词、代词或动词
