6. add vt. 增加，添加，补充说

5. throughout prep. 遍及，贯穿

4. teenager n. (13--19岁的)青少年

3. press vt. & vi. 按，压，逼迫

2. absolutely adv. 绝对地，完全地

1. agreement n. 一致，协定

7. Steve Jones tries to keep animals and plants from becom- ing endangered.　　 表示“阻止某人做某事”

☆重点词汇☆

6. We may be able to take measures before it is too late.

before 的译法

5. We human beings could not survive without all plants and animals around us.　　 表双重否定

4. The cell phone helps her do whatever she wants to do.

whatever 引导的名词从句