21、平稳地:Steadily,smoothly,slightly,slowly,marginally,gradually,moderately,mildly
22、宣称:Allege, assert, declare, claim
23、发生:Happen, occur, take place
24、原因:Reason, factor, cause
25、发展:Development, advance, progress
26、有益的:Useful, helpful, beneficial, profitable, rewarding,advantageous
27、影响:Influence, impact, effect
28、明显的: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、与…相比:Compared with,compared to,in comparison with,in comparison to,by comparison with,by comparison to
31、对比而言:By contrast,in contrast,on the other hand,on the contrary=,conversely
32、展示:Show, reveal, illustrate, demonstrate, depict, present, represent, describe
33、大约:Approximately,almost,about,around,nearly,roughly
34、波动:Fluctuate,go ups and downs,display a fluctuation,demonstrate a fluctuation
35、事实上:Practically,in practice,essentially,in essence,in reality,in effect,in fact,as a matter of fact,it is a fact that
36、换言之:Namely,that is to say,in other words,to put it like this,to put itdifferently,to put it from another way,to put it from another angle