Nowadays, we often see the word impact being used as a verb. 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:
The Hidden Costs Economic Impact of Smoking on Society Talk Tobacco
只谈医学领域，其他行业不清楚。 一作10分以上的research artical，那是相当硬气的。 10分的文章绝对能成为您的一篇代表作。 肿瘤研究领域可谓神仙打架，最高if为292。 即便如此，if. This change has no impact in the system's current behaviour. I think we should have used on instead:
This change has no impact on the system's.
My question is, should it be always followed by the preposition on? Oxford dictionaries gives the following. Is the preposition in grammatical here?
