We learn from development.

我们不妨从的发育阶段入手。

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So generally and those of you coming from high school computer science background probably used An Integrated Development Environment which actually is a gooey with menus and icons and such.

对于你们这些,有着高中电脑知识背景的同学可能一般用,即“集成开发环境“,它有一些菜单，图标等等。

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Since that's all been pushed out of the way by development, that means the food has to get shipped in from larger distances.

之后由于发展建设,耕地都不见了,这意味着食物要从相当遥远的地方运过来

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In fact, some cells are very different from the cells that are proliferating early in development.

事实上,某些细胞同发育早期所增殖的细胞,已经有天壤之别

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During development of the embryo it goes from being a single cell, the fertilized egg, to being a multi-cellular organism with billions of cells in it.

胚胎的发育,始于一个单一细胞,即受精卵,直到形成一个以十亿计数量的细胞构成的,多细胞有机体

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Well, it really happens throughout development and it happens from the first stages.

这一过程不仅贯穿整个发育阶段,并且于胚胎发育伊始就存在

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