wet behind the ears

基本解释

He was new and wet behind the ears so he became the target of all those tricks of the other boys.
他是新来的，又不老练，因而成了别的男孩耍花招的目标。
When Zhang first entered university, he was still wet behind the ears. "I had the ambition and passion to make a difference, but I didn't know how, " he says.
初进大学的张博林也是懵懵懂懂，他说那时的自己“虽然野心勃勃、热情满满想要有所作为，但是却不知道从何下手。”
That's often because entrepreneurs who are wet behind the ears don't realize that they should calculate their borrowing needs based on their worst-case scenario instead of their best-case forecast.
这种情况常常是因为初出茅庐的创业者没有意识到他们应该根据最坏的而不是最好的预测来计算他们所要借出多少钱。

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
It's a Cinderella story, but the problem is that the filmmakers haven't given us any reason to root for their wet-behind-the-ears Cinderella except that everyone else is being mean to her.
NPR: Friday Movies: Superman and the Devil
He snared Dan Rather when Mr Rather was still a wet-behind-the-ears White House correspondent.
ECONOMIST: Howard Gotlieb