I can't tell which one is her best book as I am not familiar with her books.

我不知道哪一本是她最好的书，因为我不熟悉她的书。

youdao

Before traveling in a city you are not familiar with, you should learn the local customs first.

在去一个不熟悉的城市旅游之前，你应该先了解当地的风俗习惯。

youdao

I am just not familiar with how you keep a listening journal.

我只是不太了解你是如何坚持记听力日记的。

youdao

Doctors who left medical school before nineteen-ninety may not be familiar with fibromyalgia.

VOA: special.2011.07.26

I think they sort of really understand that maybe sometimes they see things to them they don't quite understand what it is because it's not familiar to them, but it's sort connect to your own life.

我认为他们,知道有时候,自己看到一些事物不理解,是因为,对那些事物不熟悉，但他们与你的生活相联系。

麻省理工公开课 - 媒体、教育、市场课程节选

When you are not familiar with the tube system and how that works,

当你不熟悉地铁系统，不知道它如何运作的时候，

友好的英国人 - SpeakingMax英语口语达人

Doctors not familiar with ciguatera sometimes mistakenly give a diagnosis of chronic fatigue syndrome.

BBC: Fish food poisoning breakthrough

"I am not familiar with the reasons" that the subpoena was written so broadly, he said.

WSJ: Lawmakers Press Eric Holder on AP, IRS

You are likely to alarm many potential investors who are not familiar with the continent.

ECONOMIST: Letters