take sth. with a grain of salt 這個習語的字面意思是“和一撮鹽一起吃下去”，為什么要與鹽一起吃呢？
據說這個習語要追溯到羅馬時代，羅馬將軍龐培曾發現一種解毒劑，必須和着一小把鹽才服得下去。解毒劑難咽，加了鹽也許好咽些，於是這句習語用於描述對一些不靠譜的，值得懷疑的東西，得“和着鹽”才能勉強接受。
現在，對某件事情或某人說的話有所保留，將信將疑，持懷疑態度，就可以說 take it with a grain of salt.
英文注釋是：To take something with a grain of salt means to accept it but to maintain a degree of skepticism about its truth.
例句：
1）Uncle Bill tells some stories, but we take what he says with a grain of salt because he sometimes likes to exaggerate or makes
things up.
比爾大叔講了好些事情，不過對他所說的要有所保留，有時他喜歡把事情誇大。
2）This is only a sort of handout. You may take it with a grain of salt.
這只是一份分發的資料，你大可以不必相信。
3）Horoscope is fun, but it’s not necessarily accurate. I always take it with a grain of salt.
星座這東西很有趣，但是並不一定准確。我對它一向將信將疑。