Unit 2 Working the land
1. struggle 斗爭
2. expand 使變大,伸展
3. thanks to 幸虧,由于
4. rid 擺脫
5. rid…of 擺脫,除去
6. be satisfied with 對…感到滿意
7. would rather寧愿
8. therefore 因此
9. export 出口
10. regret 后悔,遺憾
11. build up 逐漸增加,建立,開發(fā)
12. lead to 導(dǎo)致
13. focus on 集中與
14. reduce 減少
15. keep...free from/of 使…免受影響
16. comment 評論,議論