“bite”是“咬”，“tongue”是“舌头”，表达的意思就是：忍住不说话，尽力忍耐保持沉默，欲言又止。

【例句】
I had to bite my tongue to keep from telling her what I really thought.
我必须忍住不说话，不能告诉她我的真实想法。

I sat through that whole silly conversation biting my tongue.
那是个无聊的对话，我坐在那里一言不发。