yī / shēng / jiě / shì / shuō / wèi / dàn / bái / méi / cān / yù / le / shí / wù / zhōng / dàn / bái / zhì / de / xiāo / huà医生解释说,胃蛋白酶参与了食物中蛋白质的消化。The doctor explained that pepsin helps digest the proteins in food.