A horse had fourteen toes in total millions of years ago.

几百万年前，马总共有14个脚趾。

youdao

And this poses a puzzle: how can characteristics that disappeared millions of years ago suddenly reappear?

这就造成了一个难题：数百万年前消失的特征是如何突然重现的？

youdao

Millions of years ago, people lived in caves.

数百万年以前，人们生活在洞。

youdao

Many of the lakes around the Grand Tetons were formed millions of years ago by slow-moving sheets of ice.

VOA: special.2009.02.16

It has high mountains. It has valleys formed by ancient ice that cut deep into the Earth millions of years ago.

VOA: special.2009.01.07

The Hawaiian Islands were formed starting millions of years ago by hot liquid rock flowing from undersea volcanoes.

VOA: special.2009.03.02

And they say the differences may have evolved millions of years ago when early humans became hunter gatherers.

BBC: Art appreciation 'a gender issue'

No one knows exactly when, but some millions of years ago Socotra split away from mainland Arabia and Africa.

ECONOMIST: An imperilled Arabian paradise

Hyper-intelligent aliens, the Old Ones, landed on earth millions of years ago.

NEWYORKER: Show The Monster