Osmosis involves the selective movement of water from one side of a membrane (a plastic film that looks similar to cellophane) to the other.
渗透也就是水从膜的一边有选择性的通过另一边。
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Once they seize hold, each tentacle begins to curl and extend, as the oligo squeezes the cytoplasm out of itself until only a cellophane-like sheet of membrane remains.