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1·What is the active ingredient in aspirin?

什么是阿司匹林中的有效成分？《牛津词典》

2·The active ingredient in some of the mouthwashes was simply detergent.

某些漱口剂中的活性成分只是清洁剂而已。《柯林斯英汉双解大词典》

3·A new hair-growing drug is being sold for three times the price, per milligram, as the drug's maker charges for another product with the same active ingredient.

一种新的毛发生长药物每毫克的售价是该价格的三倍，就如该药物的制造商对另一种含有同样活性成分的产品的售价一样。

4·What is an active ingredient?

什么是活性成分？

5·The active ingredient in Coke is phosphoric acid.

可乐中的活跃成份就是含磷的酸性物质。

6·What's the active ingredient in your sunscreen?

什么是活性成分在您的防晒霜？

7·The person is the most active ingredient in productivity.

人是生产力中最活跃的因素。

8·Can an inactive ingredient ever be considered an active ingredient?

一个非活性成分能被认为是一个活性成分吗？

9·Fortunately there are a wide array of inexpensive products that use this active ingredient.

幸运的是，现在有广泛的产品含有这一成分。

10·By 1897 a synthetic derivative acetyl salicylic acid of the plant's active ingredient was created.

1897年，这种植物中的有效成分的人工合成衍生物诞生了。