A lemon is an acid fruit.

柠檬是一种酸味水果。

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The acid has burnt a hole in my jacket.

这种酸把我的上衣烧了一个窟窿。

《新英汉大辞典》

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In eighteen ninety-seven, a chemist named Felix Hoffmann at Friedrich Bayer and Company in Germany created acetyl salicylic acid.

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And then linked to the glycerol instead of a third fatty acid chain is a water soluble molecule, like a salt.

但连到甘油上的第三个基团不是脂肪酸链,而是一种水溶性的分子,像盐一样

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They're derived from a precursor called triacylglyceride, which is as glycerol molecule with three fatty acid chains dangling off of it.

它们来源于一种叫三酰甘油的前体,由甘油分子上连接了,三个脂肪酸链构成

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He searched for years and eventually lighted on a mixture of oleic acid (a fatty acid found in various vegetable oils) and nitrogen-containing compounds called amines.

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The Lancet study compared cancer rates over a five-year period in 50, 000 people from several countries, some taking a folic acid supplement and some a placebo.

BBC: Folic acid 'cancer risk' fears played down by study

They began by finding a molecule that would carry a novel amino acid to a mammal cell's protein factories.

ECONOMIST: Synthetic biology: Expanded vocabulary | The