I barely know him.

我与他仅仅是点头之交。

《新英汉大辞典》

Many Nevadans barely know him, either.

就连内华达州也有很多人不认识他。

youdao

I barely know him - he's just someone I work with.

我不怎么了解他——他就是和我一起工作的人而已。

youdao

I barely know how to use a cell phone let alone a computer, you know,

我勉强会用手机，更不要说电脑了，你知道，

现在的孩子好可怕 - SpeakingMax英语口语达人

Ever read details about personal tragedies shared by people you barely know?

FORBES: Retweeting Jim Carrey

These poor folks simply have no time to do much fact-checking or first-hand reporting, and they barely know what questions to ask in the first place.

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This is so wrong-headed I barely know where to start.

FORBES: The Friday Stupid Rumor Of The Week: Google Buying Groupon