He is interested in history.

Due to various circumstances, we had to cancel our trip.

The Taiga drama depicts the history of Japan.

Smoking is prohibited in this park.

It seems that this river is flowing backwards.

I exchanged my old smartphone for a new one.

Please try to rephrase that word.

Please explain the meaning with '換'.

'換', in other words, means to exchange.

If you rephrase that complex theory in simpler terms, it's just common sense.