1.impetus=driving force（刺激，推动），it is the force that gets something or somebody moving，比如：车没油了，你推车前进，你就是impetus that’s getting the car moving；an impetus 还可以指无形的force，比如，厂家希望这个广告能成为an impetus to buy the product

2.固定搭配give/provide impetus to sth(为sth注入动力)

2.1想考清华的野心gives an impetus to concentration on his studies 

2.2下调进口关税 provides an impetus to better trade relations between nations

3.impetus 的形近词是impetuous=impulsive=rash(急躁的，冲动的)，比如：impulsive decision 指没有经过仔细的consideration的决定，impulsive people 指的是那些做事不走大脑的人

更多精彩内容都在单词日记app客户端。访问这个地址下载使用吧。

单词日记app下载