在婴儿初期，他们并不能在身体里制造酶以完成正常的新陈代谢，完全依赖于母乳提供的酶。
And because in early life babies do not manufacture in their bodies sufficient enzymes for normal body metabolism, they are dependent on the natural enzymes furnished in their mothers \ \ \ 'milk.
消化的初期阶段在胃里进行，在这里胃蛋白酶和脂肪酶帮助消化蛋白质和脂肪。
Early stages of digestion take place in the stomach where pepsin and lipase aid in digesting protein and fat.
为此，我们在实验初期重新定义了酶活单位，并对纤维素酶的活性测定方法进行了优化，确定了适用于本菌株产生的纤维素酶活性测定的一种较优方案。
Therefor, in the beginning of this research the activity unit was redefined and the method for measuring the activity of cellulase produced by this strain was optimized.
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