你每在英语课上学一个新单词，每解决一个数学问题，每学会唱一首新歌，你大脑中的神经元网络就会生长，大脑就会发生变化。

For every new word you learn in your English lesson, every problem you solve in maths, every new song you learn to sing, a neuronal network grows in your brain and the brain changes.

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但这并不意味着所有的变化都是由于新的神经元生成引起的。

It doesn't mean that all of the changes are due to these - birth of the new neurons.

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在对应的代码发生变化时，这种方式可以更容易地维护元数据。

This approach makes it easier to maintain the metadata as the corresponding code changes.

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When you vary time a little bit and ask, "How does R change?"

当你把时间改变一个微元,然后问,"位矢 R 会怎样变化"

耶鲁公开课 - 基础物理课程节选

b OK. In this example I'd use b. All right, as b get-- b is the thing that's changing as I go along here, but it could be things like, how many elements are there in a list if the input is a list, could be how many digits are there in a string if the input's a string, it could be the size of the integer as we go along. All right.?

好，在这个例子里我会用，因为b是一直在变的东西,但是也可能是如下情况：,如果输入是数组的话,变化的就是数组的元素数，如果输入是字符串的话,变化的就是字符串的长度，如果是integer的话,可能就是这个数的大小，对不对？

麻省理工公开课 - 计算机科学及编程导论课程节选