work hard
问题描述:
work hard
答
致力于/努力 ...
He works hard at Math."他努力学习数学"
答
努力工作于。。。
答
努力致力于
答
致力于
答
对什么很努力
致力于 [简明汉英词典]
apply oneself to
bend oneself to
commit oneself to
hammer at
take up with
答
工作艰苦