你不知道有多少包装里是没有说明书的吗？

You don't know how many packs are without manuals?

youdao

我问了她一些关于这本书的问题，很明显她根本不知道书是我写的，她甚至主动提出看完以后把它借给我。

I asked her some questions about it, and it was so clear that she had no idea that I'd written it. She even offered to lend it to me after she'd finished.

youdao

我不知道还可以叫老师将一本书放在保留书目里。

I didn't know that I could ask a professor to put a book on reserve.

youdao