be well up in/on something

1 (also be up on something American EnglishAmE) informal to know a lot about something 非常熟悉某事；精通某事

I’m not all that well up in musical matters.

音乐方面我不太懂。

Conrad’s really up on his geography, isn’t he?

康拉德地理学得非常好，是吗？

Examples from the Corpus

be well up in/on something• By eight o'clock, when the first pair was due to tee off, the sun was well up in a clear sky.• But deep inside there was a brooding that was welling up in him.

→ be well up in/on something at up1(7)

2 informal especially British EnglishBrEKNOW something to know a lot about a particular subject 对〔某个科目〕非常熟悉

Geoff’s always been well up on the internet.

杰夫对因特网一直都懂得很多。

Examples from the Corpus

be well up in/on something• By eight o'clock, when the first pair was due to tee off, the sun was well up in a clear sky.• But deep inside there was a brooding that was welling up in him.

→ be well up in/on something at well1(14)

be well up in/on somethingChinese

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be well up in/on something

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