经验库词典网为您提供focus on是什么意思,focus on的用法,focus on的词性,focus on的词根,focus on短语搭配,focus on双语例句等服务，让您轻松背单词。

经验库词典网为您提供focus是什么意思,focus的用法,focus的词性,focus的词根,focus短语搭配,focus双语例句等服务，让您轻松背单词。