The negative value of solute potential of a solution means if a solution is separated from pure water by a selectively permeable membrane.
溶质势的负值表示若某溶液与纯水被一选透膜分隔，水会由水势较高的纯水进入该溶质。
Like the blood-brain barrier, this is only selectively permeable, keeping any toxins in the blood from reaching the delicate photoreceptors.
和血脑屏障相同，它是选择性可透的，阻挡血液中的有害物质进入到精致的感光层。
Like the blood-brain barrier, this is only selectively permeable, keeping any toxins in the blood from reaching the delicate photoreceptors.
和血脑屏障相同，它是选择性可透的，阻挡血液中的有害物质进入到精致的感光层。
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