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10. the elderly = the aged = the old老年人

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

8. be of no effect　 無效　　　　　　 side effect　 副作用

7. come into effect 開始生效 (come into force)　　 bring sth. 　into effect　 實(shí)施　

6. have an effect on 對…影響　　 produce an effect of (doing) sty 產(chǎn)生…效果

5. economy class 經(jīng)濟(jì)艙　 national economy 國民經(jīng)濟(jì)

4. economic development　 economical 節(jié)儉的，節(jié)約的　 an economical car to run　 節(jié)油汽車

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

2. take it easy 別著急　　　　

1. in the east of (在里面)　 to the east of　 不連接)　 on the east of (接攘)