be unable to refrain from
⇒ 他们情不自禁地欢呼起来。
They were unable to refrain from cheering.
⇒ 我们情不自禁唱了起来。
We couldn't help but start singing.
英语词典包含298861条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。