This region has also experienced drastic changes in the world.

In the past decade, the advancement of technology has changed so much that it can be described as 'drastic changes in the world'.

This area has undergone such a great change that it can be described as 'the sea has turned into a mulberry field'.

His life changed just like 'fields and mountains turn into seas and oceans'.

This year was a very busy year.

I think it's accurate to say that.

His attitude suddenly changed.

The advancement of technology has greatly changed our lives.

We are witnessing the progress of science and technology.

His progress in Japanese is astonishing.