18、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
19、保持穩定：Level out，do not change，remain stable，remain still，remain steady，be stable，maintain the same level，remain unchanged，be still，remain the same level，stay constant，keep at the same level，level off，stabilize，keep its stability，even out
20、急劇地：Dramatically，drastically，sharply，hugely，enormously，steeply，substantially，considerably，significantly，markedly，surprisingly，strikingly，radically，remarkably，vastly，noticeably
21、平穩地：Steadily，smoothly，slightly，slowly，marginally，gradually，moderately，mildly
22 、宣稱：Allege, assert, declare, claim
23、發生：Happen, occur, take place
24、原因：Reason, factor, cause
25、發展：Development, advance, progress
26、有益的：Useful, helpful, beneficial, profitable, rewarding， advantageous
27、影響：Influence, impact, effect
28、明顯的：Clear, obvious, evident, self-evident, manifest, apparent, crystal-clear
29、占：Comprise, take up, account for, constitute, consist of, make up, occupy, hold, compose
30、與…相比：Compared with，compared to，in comparison with，in comparison to，by comparison with，by comparison to
31、對比而言：By contrast，in contrast，on the other hand，on the contrary=，conversely
32、展示：Show, reveal, illustrate, demonstrate, depict, present, represent, describe
33、大約：Approximately，almost，about，around，nearly，roughly
34、波動：Fluctuate，go ups and downs，display a fluctuation，demonstrate a fluctuation
35、事實上：Practically，in practice，essentially，in essence，in reality，in effect，in fact，as a matter of fact，it is a fact that
36、換言之：Namely，that is to say，in other words，to put it like this，to put it differently，to put it from another way，to put it from another angle。
