In the much more distant past, other ice ages have occurred.

在更久远的过去，其他冰河时代也曾发生过这种情况。

youdao

There have been at least four major ice ages in the Earth's past.

至少有四个主要的冰河，在地球的过去。

youdao

There have been at least four major ice ages in the Earth's past.

至少有四个主要的冰河，在地球的过去。

youdao