If I decide there's a better way to get input, and there is, then I can make it to change what I don't have to change the code that uses the input.
如果我觉得有更好的获取输入的方法,我可以直接改去用这种方式,而不用更改使用了,输入处的代码。
stem cell researchers have found a way to get perfectly usable stem cells from fully grown human beings.
干细胞研究者已经找到了一种方法,
可以从成年人身上获取可用的干细胞。
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