Brewers Dictionary of Phrase and Fable steers us back to Latin in explaining that Pliny thought hyenas had a kind of stone in their eye, that if you put under your tongue gave the gift of prophecy.

《布留沃成语和寓言词典》把我们的视线拉回到拉丁语世界，它写道，古罗马作家普林尼认为，鬣狗的眼睛里有某种石头，若把它压在舌头下，你就能预知未来。

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The universe is giving you the gift of a silver tongue - don't underestimate its power.

这样的星相给你铁齿铜牙，不要看少它的力量！

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She was also presented by her staff with a tongue-in-cheek gift of protective headgear in the shape of a football helmet emblazoned with her department's seal.

BBC: Hillary Clinton returns to work at US state department