还记得 bite head off 和 bite the dust 的寓意吗？今天又多了一个关于 bite 的习语 bite tongue，字母意思是"咬舌头“，想象一下，咬住舌头是不是很难出声，所以 bite tongue 可以意为”尽力忍耐保持沉默，欲言又止“，寓意：
to keep yourself from saying something that you really want to say
不让自己说出你真正想说的话
to stop one’s self from saying something rude
阻止自己说粗鲁的话
a way of telling them to stop speaking before they say something unwanted
在说多余的话之前，告诉他们不要说话
refrain from saying something one wants to say, because the moment is inappropriate
克制不说自己想说的话，因为时机不合适
解析：refrain from doing sth 表示忍住不做某事。
例如：
I had to bite my tongue when Peter said that he was hard-working.
当彼得说他很努力时，我不得不尽力忍耐保持沉默。
解析：have to 是半情态动词，后面接不带 to 不定式。
I always have to bite my tongue when my sister-in-law is around.
当我嫂子在的时候，我总是忍住不说话。
解析：sister-in-law 有多种意思”大(或小)姨子；大(或小)姑子；嫂子；弟媳；妯娌；丈夫的(或妻子的)嫂子(或弟媳)“，要根据具体的上下文。
It is better to bite one's tongue than to say something nasty about someone else.
与其说别人的坏话，不如保持沉默。
Bite your tongue! He doesn't want to hear your opinion about everything.
保持沉默！他不想听你对一切的看法。
I have to bite my tongue not to give my sister advice on her new baby.
关于我妹妹的新宝宝的建议，我不得不保持沉默。
解析：还记得区分 advise 和 advice 哪个才是名词的记忆方法吗？
很多东西，看破不要点破，有的时候大智若愚比夸夸其谈好，祸从口出，这也就是为什么人要保持低调的原因。
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