Is the preposition in grammatical here? Her speech made a profound impact on everyone. Impact 通常指“ 重大的影响 ”，名词，动词形式都有。 我们先来看 impact:
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I think we should have used on instead:
This change has no impact in the system's current behaviour.
My question is, should it be always followed by the preposition on? This change has no impact on the system's. Oxford dictionaries gives the following. Nowadays, we often see the word impact being used as a verb.
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