She retained a number of copies for further annotation.

她为进一步解释保留了好多复印件。

《柯林斯英汉双解大词典》

An unlimited number of copies can still be made from the original.

无限量的复制品依然能从原物制作出来。

《柯林斯英汉双解大词典》

Thus, the number of pages used is the number of pages printed times the number of copies sent.

因此，使用的页面数量就是打印的页面数量乘以发送的拷贝数量。

youdao

The number of copies you get depends on how many times you do the cycling.

具体的产物数量取决于你进行循环的次数

耶鲁公开课 - 生物医学工程探索课程节选

So what you get on the plate is many copies of the small number of plasmids that you've put in.

我们只要放入少量质粒,就能在培养基上得到大量的复制品

耶鲁公开课 - 生物医学工程探索课程节选

Sure enough, they found that in each of the lines, the number of copies had grown.

ECONOMIST: Truly selfish genes

Advertising rates should be based on readership, he says, not the number of copies sold.

FORBES

Then they bred each of the lines for 200 generations and counted the number of copies again.

ECONOMIST: Truly selfish genes