So, " to babble on" means to talk without stopping.

所以，“喋喋不休”就是不停地说话。

You had to babble on about " Bastille" By Pompeii?

你一定要说什么庞贝古城里的巴士底狱吗？

Then, around four months of age they begin to babble.

然后，大约四个月大的时候，他们开始咿呀学语。

That makes them among a few mammals— like marmosets— whose offspring utter sounds similar to babbling in babies.

这使它们成为少数哺乳动物（如狨猴）中的一种，它们的后代发出的声音类似于婴儿的牙牙学语。

Babies all over the world begin to babble around the same age, and they all begin to make the same kinds of babbling noises.

世界各地的婴儿在相同的年龄开始咿呀学语，他们都开始发出相同的咿呀学语的声音。