Lactose intolerance stems from a deficiency of the enzyme lactase, which is needed to help digest lactose, a sugar in milk.

乳糖不耐症的病因是缺乏乳糖酶，这些乳糖酶是消化乳糖的必需物质，牛奶中的糖就属于此类。

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Adding enzyme to the feed can help animal to digest nutrient of the feed and increase efficiency of the feed and promote animal to grow up.

饲料中添加酶可帮助动物对饲料养分的消化吸收，大幅提高饲料效率，促进动物生长。

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Depend, before meal with empty stomach Enzyme can cleanse your blood, after meal is to help digest so you can absorb the nutrient from your food.

根据需要不同，都可以。饭前吃，有利于清除血液毒素，饭后吃，有利于吸收营养。

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We're going to take a chromosomal DNA, we're going to digest it with this restriction enzyme, we're going to put it in this tube and run it on a gel, and we're going to see what results down here.

我们取一条染色体DNA,然后用限制酶进行分解,接着再放,在凝胶上进行电泳,之后看看结果如何

耶鲁公开课 - 生物医学工程探索课程节选

Researchers reasoned that an enzyme that breaks down proteins, which had the ability to digest proline-rich chains might be able to break down the gliadin fragment, making it harmless.

BBC: Cause of dietary disorder uncovered