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There's more than a grain of truth in that.

其中包含不少真理。

《柯林斯英汉双解大词典》

There isn't a grain of truth in those rumours.

那些谣传一点也不可靠。

《牛津词典》

in some ways, one has to admit also there maybe a grain, if not more than a grain of truth in what he seems to be saying.

我们多么不喜欢他，但必需承认,他可能有点儿道理，但就那么点儿,关于他所说的话。

耶鲁公开课 - 政治哲学导论课程节选

And you know, there's, some of those were based in a grain of truth.

NPR: Sen. Cornyn: NSA Phone Tracking a Useful Tool

He said he believes there might be a grain of truth to Dorner's allegations of a cover-up.

CNN: LA cops stalked by suspect -- and a brutal past

He does, however, see a grain of truth in the notion that Asian mothers, more comfortable than Westerners with the idea of meritocracy, drive their children hard.

ECONOMIST: The contest with China moves into the classroom and nursery