however, mucosae are also responsible for nutrient absorption and waste secretion, which require a selectively permeable barrier.
然而,粘膜还负责养分吸收和废物的分泌,这需要选择性渗透屏障。
The living cells ( cell membranes ) of potato is selectively permeable.
因活的马铃薯细胞 ( 细胞膜 ) 是选透性的.
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