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1·A drug is a chemical substance.

毒品是一种化学物质。

2·Every chemical substance is a key to the gates of heaven and hell.

每一种化学物质都是一把打开天堂和地狱之门的钥匙。

3·A molecule is the smallest part of a chemical substance.

分子是化学物质的最小的部分。

4·This chemical substance can be resolved into an acid and oxygen.

这种化学物质可以分解成一种酸和氧。

5·Beware of the commodities, i. e. liquid, gels, chemical substance.

特别注意以下物品：液体，凝胶，化学物品。

6·Some of them had exposed to metal dusts and special chemical substance.

部分患者有接触金属粉尘、特殊化学物质史。

7·Let's take a look at how the toxic chemical substance was found on the island.

让我们看看台湾如何发现这种有毒化学物品的。

8·A chemical substance that prevents or slows a cathodic or reduction reaction.

一种阻止或减缓阴极反应的化学物质。

9·We can get a new substance if we incorporate a chemical substance with others.

如果我们把一种化学物质和其他化学物质混合就能得到一种新物质。

10·Celery contains a valuable chemical substance that helps lower blood pressure.

芹菜中包含一种珍贵的化学物质，有助于降低血压。