截止到二十岁，在他们的生涯里已经有总计一万小时练琴。

By the age of 20, the elite performers had all totalled 10,000 hours of practice over the course of their lives.

youdao

若是从五岁到二十岁，男子你要估定二十舍客勒，女子估定十舍客勒。

And if it be from five years old even unto twenty years old, then thy estimation shall be of the male twenty shekels, and for the female ten shekels.

youdao

专家说人们最好在十六岁到二十岁之间做口腔检查，为即将长出的智齿做准备。

Experts say people should have their mouths examined between the ages of sixteen and twenty for placement of their wisdom teeth.

youdao

So, you can imagine in certain circumstances there would be guys that old back there, but fundamentally it's between 20 and 45.

所以你能想象,在某些情况下,也会有老年人,但基本上是二十到四十五岁的

耶鲁公开课 - 古希腊历史简介课程节选