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.

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同一蛋白质水平下，18%脂肪水平组胃、肠道和幽门盲囊的蛋白酶和脂肪酶活性均略高于9%脂肪水平组。

Under the same protein level, the protease and lipase activities of stomach, intestine and pyloric caeca in 18% lipid level groups were slightly higher than those in 9% lipid level groups.

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同一蛋白质水平下，18%脂肪水平组胃、肠道和幽门盲囊的蛋白酶和脂肪酶活性均略高于9%脂肪水平组。

Under the same protein level, the protease and lipase activities of stomach, intestine and pyloric caeca in 18% lipid level groups were slightly higher than those in 9% lipid level groups.

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