1、Unit 2 Saving the EarthTopic2 all these problems are very serious 这些问题都很严重1 sorry to hear that 听到感到很遗憾2 change into 转变成 As a result, a lot of rich land has changed into desert. 结果，许多富饶的土地转变成沙漠。3 affect 。动词。 effect,影响，名词，形容词： effective 有效的4 stop sth. from doing sth. 阻止某物/某人做某事 Trees can stop the wind
2、 from blowing away. 树木可以阻止风刮走地表的泥土。5 save, 储存，保存，拯救 ，节省6 need to do sth. 需要做某事 we need to do something to protect the environment. 我们仍旧要采取措施来保护环境。Section B 1 produce 生产，动词。Producer 生产者，名词。Production，生产，名词。Product 产品，名词。2 user 使用者3 But the government is doing something useful to protect the environme
3、nt. 这里不定式用作目的状语。4 none of 没有一个 both of 两者都 ， either of 两个当中的任意一个，all of 全部，用于三者以上5 here and there 到处都是 6 dont walk on grass 不要在草地上乱走7 make noise 制造噪音 8 worst of all 最糟糕的是9 make rules 修订规则10 change the situation 改变状况11 break the rules 打破规则。 Follow the rules 遵守规则， obey the rules 遵守规则Section C1 disappe
4、ar 消失， appear 出现2 health problem 健康问题3 dead 形容词，死。die 动词，death 名词4 through,穿过，从物体内部穿过 如 through the door/window/forest/glassesacross 从物体表面穿过 across the river/street/bridge5 cause cancer 导致癌症6 level 层次，the level of the oceans 海平面7 climate 气候 ， weather 天气Section D1 seem to do 似乎做某事 He seems to cry.他似乎要哭了。2 plenty of 大量的，后可以加名词单数或者复数3 shortage of water 水资源短缺 shortage 是名词，形容词为 short4 avoid 避免 5 reuse 重复利用 6 day by day 一天天地7 else 其他的8 be covered with 被 覆盖
