When somebody invented the automobile, before you knew it everyone was driving automobiles and they all looked pretty much the same.

有人发明了汽车,不知不觉,每个人都开上汽车了,而且那些汽车外形看起来都差不多

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It's able to do that because there are cells like this particular cell that have shapes that are suited to their function.

之所以这样是因为它的细胞像这个,染色细胞一样具有与功能相适应的外形

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They have a slightly smaller body to them but violins and violas have the same general construction.

小提琴的外形比中提琴稍微小些,但它们的构造大体相同

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Neurons actually look quite different from one another but this is a typical one.

尽管神经元的外形各不相同,但这是一个典型的神经元

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There's a change in sort of the shape of the overall embryo as well.

与此同时,胚胎的外形,也有一定程度的变化

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There's a cluster of cells here, there's a sheet of cells that forms an outer lining, and what is most noticeable is this cavity, this fluid filled cavity which begins to develop.

有一簇细胞,一层细胞构成了外形轮廓,最明显的结构就是这个空腔,这一充满液体的空腔开始发育形成

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