Stop dating her. She's still wet behind the ears.

别和她约会，她还是乳臭未干呢。

youdao

Don't rely on his advice; he's still wet behind the ears.

不要依赖于他的建议；他尚初出茅庐。

youdao

This group of new comers are wet behind the ears, but I find that they have some very good ideas.

虽然这批新人虽然都是初来乍到，可我发现他们有些想法还是很不错的。

youdao

When he was still wet behind the ears, he and Stanislas Yassukovich came up with the idea of creating for these markets a negotiable certificate of deposit.

ECONOMIST: Michael von Clemm

At one point, he feinted in that direction, allowing that his opponent regarded him as "green behind the ears" (cliche police: that's green, senator, or wet behind the ears).

BBC: McCain's jabs fall short of Obama

You can believe Brolin has seen some action, but Gosling just comes off as wet behind the ears -- there's no rapport between them, and no real reason to care when things go sour.

CNN: Review: 'Gangster Squad' offers a thin gloss on LA crime