某人忍不住(或无法抑制)做某事;不可能避免某事
sb cannot help (doing) sth
used to say that it is impossible to prevent or avoid sth
I can't help thinking he knows more than he has told us.我总觉得他没把他知道的事全告诉我们。
释义来自《牛津高阶英汉双解词典》第 9 版