She's right-handed.

她习惯用右手

Those of you who are right-handed, which comprises about nine out of ten people, have language in your left hemisphere.

你们中惯用右手的人，也就是十分之九的人，语言功能位于左半球。

I batted left-handed and bowled right-handed.

我左手击球，右手投球。

Usually, the left-side brain is dominant, which is why 90% of people are right-handed.

通常，左脑占主导地位，这就是为什么90%的人都是使用右手。

For right-handed people, that's usually the left side.

为右撇子的人，通常是在左边。

But have humans always been so heavily right-handed?

但人类是否一直都如此偏好右手呢？