He was—what is the phrase I’m looking for—not intimately acquainted with his subject.
他——我该怎么说呢——对自己的主题很不熟悉。
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Next one is from black American slang it's entered the mainstream English language and it is mojo Yeah, well, I think many people of my age group were acquainted with this phrase because of the film series Austin Powers.
下一个来自美国黑人俚语,它已经进入了主流英语,它是 mojo。是的,嗯,我想我这个年龄段的许多人都知道这个短语,因为电影系列 Austin Powers。