1. 名詞
   動力, 原動力
   推動力
   推動
   促進, 刺激
   an impetus to/for ...(活動、過程等)/
   impetus to/for ...(活動、過程等):
   /介系詞to通常與動詞give的使用相關/
   /其它情況可用for/
   ...的動力
   ...的原動力
   

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   同義字詞
   boost,encouragement,goad,impulse,incentive,incitation,incitement,instigation,momentum,motivation,provocation,spur,stimulant,stimulus,yeast
   

例句

1. The impetus came from the unions.
2. The impetus for adventure is inside us.
3. Fresh impetus came from the White House.
4. What the economy needs is a new impetus .
5. This gave much impetus to his reputation.
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