There is no going back to the age when large objects were complex and small objects were simple.

一、提炼句式

There is no going back to {X}. (there is no going back没有退路）

再也回不到......；过去......的时代早已一去不复返了。

二、造句示范

There is no going back to the pre-COVID-19 world.

Once people are used to extravagant life, there is no going back to a frugal one. 由俭入奢易，由奢入俭难。

三、造句实战

There is no going back to the days when we were free of all care.

There is no going back to the age when books function as the main source of information. With mass media flourishing, we now have easy access to an assortment of information.