Gargle and clean your teeth after eating persimmon lest the tannic acid, pectin and sugar damage your teeth.

吃完柿子记得刷牙漱口，以免柿子中的单宁酸、果胶和糖分，侵蚀牙齿。

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Seven years ago his father, Robert, produced a diamond in a high-pressure chamber of carbon gas and dropped it into an acid solution to clean it off.

七年前他的父亲罗伯特在一间高压碳气室中制造了一颗钻石，把它放入酸性溶液中清洗干净。

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If it does not, check the toilet bowl rim holes (through which the water enters the bowl) with a small mirror, and if they are blocked, clean them with a small nail and acid-based porcelain cleaner.

如果没有，那么用小镜子检查一下冲马桶的进水口，看看是不是被堵住了，用细钉子或者抗酸陶瓷清洁器清洁一下。

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This wiped clean the popular memory of fiery exchanges, interruptions and acid put downs that had defined the previous century.

CNN: Why should the press be polite to presidents?