I recognized him by his walk.

我根据他走路的样子认出了他。

《牛津词典》

At that point, I recognized him.

就在那时我认出他来了。

youdao

I recognized him from his clothes.

我从他的衣服上认出了他。

youdao

"We might have crossed paths, but I wouldn't have recognized him, " said Ben Leung, a 27-year-old pharmacy student who lives on the first floor.

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But I keep pushing him and hoping he'll be recognized for the brilliant artist he is.

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