1、确保：Assure, ensure, guarantee, pledge

2、有害的： Bad, banul evil, harmful, detrimental

3、要求 ：Request, demand，needs, requisition

4、消除 ：Eliminate，clear，remove，clear up，take away，smooth away

5、导致： Lead to，bring about，result in，cause，spark off，conduce to，procure，induce，generate

6、因此：So, therore, thus, hence, consequently, as a consequence,accordingly, as a result, because of this, as a result of this

7、增长至：Grow to，rise to，increase to，go up to，climb to，ascend to，jump to，shoot to

8、降低至：Dip to，fall to，decline to，decrease to，drop to，go down to，reduce to，slump to，descend to，sink to，slide to

9、保持稳定：Level out，do not change，remain stable，remain still，remain steady，bestable，maintain the same level，remain unchanged，be still，remain the samelevel，stay constant，keep at the same level，level off，stabilize，keep itsstability，even out

10、急剧地：Dramatically，drastically，sharply，hugely，enormously，steeply，substantially，considerably，significantly，markedly，surprisingly，strikingly，radically，remarkably，vastly，noticeably

11、平稳地：Steadily，smoothly，slightly，slowly，marginally，gradually，moderately，mildly

12、宣称：Allege, assert, declare, claim

13、发生：Happen, occur, take place

14、原因：Reason, factor, cause

15、发展：Development, advance, progress

16、有益的：Usul, helpful, benicial, profitable, rewarding， advantageous

17、影响：Influence, impact, fect

18、明显的：Clear, obvious, evident, self-evident, manifest, apparent,crystal-clear

19、占：Comprise, take up, account for, constitute, consist of, make up,occupy, hold, compose

20、与…相比：Compared with，compared to，in comparison with，in comparison to，bycomparison with，by comparison to

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