That lad appears to be very proud, but actually he is still as green as grass.

那个小伙子似乎很骄傲, 但实际上他还很无知.

《简明英汉词典》

When she left school and started her first job, she was as green as grass.

她走出校门刚开始工作时非常幼稚.

辞典例句

Let nim pass through this time, because he as green as grass.

我猜可能是新手的意思吧.这次让他通过吧, 毕竟他还是个新手.

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She was as green as grass when she was sixteen.

她16岁时,年轻无知,十分天真.

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Let him pass through this time, because as green as grass.

因为他毫无经验这次就放过他吧.

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Give the new lad a hand if he needs it; he's as green as grass.

如果需要的话,帮帮那位新来的小伙子, 他还缺少生活经验.

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