两千万年前，爱达荷州遍布着茂密的原始森林。

Twenty million years ago, Idaho was populated by dense primordial forest.

有超过两千万的美国人拥有自己的观赏鱼。

More than 20 million Americans own pet fish.

有胜过两千万的美国人具有自己的玩赏鱼。

More the 20 million Americans own pet fish.

一些学者认为人类和猿的分化出现在一千五百万到两千万年前。

The split between humans and living apes is thought by some scholars to have occurred 15 to 20 million years ago.