9. make an effort to do 做出努力去做　　 spare no efforts to do 不遗余力去干…

8. be of no effect　 无效　　　　　　 side effect　 副作用

7. come into effect 开始生效 (come into force)　　 bring sth. 　into effect　 实施　

6. have an effect on 对…影响　　 produce an effect of (doing) sty 产生…效果

5. economy class 经济舱　 national economy 国民经济

4. economic development　 economical 节俭的，节约的　 an economical car to run　 节油汽车

3. eat one's words = break one's promise 食言　

2. take it easy 别着急　　　　

1. in the east of (在里面)　 to the east of　 不连接)　 on the east of (接攘)