The book consists of four volumes.

这本书共有四卷。

youdao

The four volumes compose a single book.

那四册构成一卷书。

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Let's review what we learned about in front of four volumes.

让我们来复习一下前面四卷所学的内容。

youdao

Let's review what we learned about in front of four volumes.

让我们来复习一下前面四卷所学的内容。

youdao