Acids produce positively charged hydrogen atoms when dissolved in water.

酸在水中溶解时可生成带正电荷的氢原子。

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Carbon dioxide Inorganic compound, a colourless gas with a faint, sharp odour and a sour taste when dissolved in water, chemical formula CO2.

二氧化碳一种无机化合物，无色而略带刺鼻气味和酸味的气体。化学式CO2。

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Inert gases form clathrate hydrates when dissolved in water, astrict the activity of water molecule, prolong the store of fruits and vegetables.

惰性气体可以在水中形成笼形水合物，限制水分子的活动，延长果蔬的贮存时间。

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Among her inventions was a sort of bouillon cube that, when dissolved in water, produced a cola-like drink.

WSJ: Book Review: Hedy's Folly

It probably does not matter if some silk gets into a vaccine when it is dissolved in water prior to inoculation.

ECONOMIST: Monitor

Many frequent travellers swear by fruit flavoured tablets that act as fizzy cocktails of vitamins, herbs and minerals when the tablet is dissolved in water.

BBC: The flu is a frequent traveller