bite your tongue, 这个短语的含义不是指“咬住你的舌头”，其正确的含义是保持缄默；缄口不语；忍住不说（希望某事不要成真）

【例句】
I wanted to tell him exactly what I thought of him, but I had to bite my tongue.
我本想明确告诉他我对他的看法，可是不得不保持沉默。

I had to bite my tongue as my sister gushed about her new boyfriend yet again.
我必须缄口不言因为我的姐姐又在滔滔不绝地谈论她男朋友。