古文典为您提供keep on是什么意思,keep on的用法,keep on的词性,keep on的词根,keep on短语搭配,keep on双语例句等服务，让您轻松背单词。

古文典为您提供keep off是什么意思,keep off的用法,keep off的词性,keep off的词根,keep off短语搭配,keep off双语例句等服务，让您轻松背单词。