Stereotypes often have a grain of truth.

刻板印象往往有一点道理。

Our observations may contain a grain of truth for you to refer to.

我们的意见也许会有千虑一得之处， 供你参考。

There wasn’t a grain of truth in what he said.

【truth】他的话没有一点真实的成分。

There is a grain of truth in all folklore and legend.

【grain】所有的民间故事和传说中都带有一点真实的成分。

But even though toad bumps aren’t contagious, there’s a grain of truth to the idea.

但即使蟾蜍疙瘩不会传染， 这个想法也有一定道理。

Now again, what's interesting about this myth is that although it's basically a myth, there is a grain of truth to it.

它的有趣之处在于虽然这基本上也是个错误观念， 但也并不是完全错误。