一个人看见自己的男（女）朋友和别的异性朋友谈得亲热的的时候，就会产生一种情绪，象是一口气喝了一大碗酸醋似的，正式名称是嫉妒。

When people see his girl (or her boy) friend is having fun intimately with another boy (girl), a strong feeling will arise as swallowing down a big bowl of vinegar. That is "jealous"in a formal term.

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能和醋媲美的还有柠檬汁，其中的柠檬酸也有和醋酸相似的效用。

Lemon juice, which contains citric acid, has a similar effect, and it is likely that lime juice does as well.

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