以前好像也看到过类似的别的词, Vt和Vi, 挺绕的. 是不是说: impact: Noun, 当影响讲时应该用 have an impact on impact: Vt, 没有影响的意思, "压紧", "塞入","碰撞,冲击" impact: Vi 撞击;发生影响; 表示影响时应该用" impact on st."
some people hate to see impact used as a verb " to influence ' or" have an effect on". some don't even like " impact' as a noun if " effect ' can be used instead.