To think of his sing ,i could hardly help laughing.这句话中help是什么意思?

问题描述:

To think of his sing ,i could hardly help laughing.这句话中help是什么意思?
这句话怎么翻译

一想到他的歌,我就情不自禁想笑
这是一个词组搭配,can hardly help doing sth:情不自禁