You want to support different size classes.

你想要支持不同尺寸的类。

youdao

It has size classes for object sizes that are a power of two minus a constant.

它有一些用于对象大小的size类，这些对象的大小为2的若干次幂减去某一常数。

youdao

We have increased the number of teachers but the size of the classes hasn't changed proportionately.

我们已增加了教师的数量，但班级的大小并没有成比例地改变。

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And class size is pretty small if you go up to, you know, advanced level classes.

班级挺小的，如果，你知道，你去上高级课程的话。

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