预测一个与今天大不相同的世界也是可能的，但很困难。

It's possible to imagine a future that is greatly different from the present, but it's difficult.

youdao

当时的世界与今天大不相同。

At that time, the world was much different than it is today.

youdao

当时的世界与今天大不相同。

At that time, the world was much different than it is today.

youdao