渗透膜不能保持营养平衡(制糖)酵母细胞内的副产品(乙醇)之外。
The membrane cannot maintain the osmotic balance of nutrients (sugar) inside the yeast cell and the by-products (alcohol) outside.
背景：甘蔗蜡作为制糖工业的副产品，在非医药方面已有广泛的用途。
BACKGROUND: as a by-product in sugar industry, sugar cane wax has been widely used in non-medical field.
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