Not to know what happened before one was born is always to b

Not to know what happened before one was born is always to be a child.

不懂世故，幼稚可笑。

Lacking sophistication or worldly experience; naive.

幼稚的,天真的不世故的,天真的

Do you really believe that sophomoric argument?

你当真相信那种幼稚可笑的论点吗？

I wish you could see us carry one about her.

你没看见我们逗她玩时多么幼稚可笑！

B: Don't be childish and capricious. You want to change the world? No way, it is just the world that will change you.

别幼稚任性了。你想改变这个世界？决不可能的。只能是这世界改变你。

He was ignorant of the world.

他不懂事，他不谙世故。

To be opposed to such preparations, as some people in our ranks were at one time, is childish and ridiculous.

我们队伍中曾经发生过的反对准备的意见是幼稚可笑的。

adolescent insecurity; jejune responses to our problems; their behavior was juvenile; puerile jokes.

青春期的不安全感；对我们的问题的稚气的回答；他们的行为是幼稚的；孩子气的玩笑。

Naive,perhaps,but whom did her naivete harm?

这大概有点幼稚，可这幼稚又能伤着谁呢?

He felt people were contemptuous of his lack of sophistication.

他觉得人们看不起他不懂人情世故。

Peter was laughed at for his naive remarks.

彼得因为讲了一些幼稚的话而被嘲笑。

Colin: Yep - a real juvenile joke-teller!

科林：对，一个很幼稚的说笑话的人。

If you pretend to know what you don't know, you'll only make a fool of yourself.

不懂装懂就会闹笑话。

an unsophisticated country fellowwho completely lacked polish

全无文雅气质不懂世故的乡下人

The young man has But little knowledge of the world.

那个年青人不懂什么世故。

a disparaging term for an unsophisticated person.

对不懂世故的人的一种蔑视的称呼。

babes [a babe] in the wood(s)

天真而易受骗的人,不懂世故的人

It seems to me that Peter has seen nothing of life.

在我看来, 彼得还不懂人情世故。