He is playing the role of building bridges between the two countries.

We are planning to build a bridge over this river.

The ferry is crossing the river.

Please tell me the stem of this word.

I am studying Korean language.

His five sense organs are very sharp.

It's important to enjoy cooking by fully using your five senses.

These two parts have interchangeability.

These two software are completely interchangeable.

He fought a court battle to gain custody of his child.