"a pinch of salt" 的意思是?

"a pinch of salt" 的意思是? 什么是With a pinch of salt,是个成语吗 求正确的答案 take with a pinch of salt take care of take part in take on 美语a pinch of So take your biggest pinch of salt and read on...怎么翻译 salt of the earth的意思 salt的意思 with a grain of salt a covenant of salt for a pinch of joy.a dash of tenderness.a spoonful of affection. 英语翻译求英文翻译.A heap of PerfectionA spoonful of DevotionA pinch having a taste like that of salt