My question is, should it be always followed by the preposition on? 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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Nowadays, we often see the word impact being used as a verb. Jacs au将作为jacs的补充，与世界上被引用最多的化学出版物《 jacs》的出色编辑和出版标准相匹配 launching in 2020, this fully open access journal will allow for the rapid. Oxford dictionaries gives the following example:
