对于平稳的趋势的描述，可以使用的动词或动词词组： to hardly change to have little change to keep steady to level off to remain constant to stay the same
表示程度的副词： 1. 程度较大： considerably dramatically GREatly markedly obviously quickly rapidly sharply significantly suddenly
2. 程度较小： slightly gradually slowly steadily
时间的嵌入
嵌入时间时所使用的介词和介词词组： in
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