They're still wet behind the ears and have a lot to learn.

他们还很稚嫩，还有很多东西要学。

This might be because they're wet behind the ears or maybe they just don't want the aggro of designing their own workout plan.

那些毫无经验或者懒得自己制定健身计划的人们可以请个私人教练。

The idiom " wet behind the ears" is used to describe someone who is inexperienced or naive, particularly in a specific area or situation.

“wet behind The ears”这个习语用来形容一个人缺乏经验或很天真，尤其是在特定的领域或情况下。

I remember when I was still wet behind the ears and the veterans in the company gave me the benefit of their time and expertise.

我记得当我还不知所措的时候，公司的老兵们给了我他们的时间和专业知识。

Work – average, needs to work on expressing ideas more clearly… I'm a bit concerned about progress, maybe a little wet behind the ears… goodness, did I really write that?

学习方面——表现平平，需要加强清楚表达观点的能力… … 我有点儿担心你的发展，可能有点儿乳臭未干… … 天呐，我真的是这么写的？

And so we get those steps towards building that, that incredible, wise version of Superman, rather than the, you know, still wet behind the ears kind.

因此，我们采取了这些步骤来构建那个令人难以置信的、明智的超人版本，而不是你知道的、仍然湿漉漉的超人。