We crossed the river by crossing the pontoon bridge.

We should respect the ancient customs of that region.

He is doing a specialized study in economics.

He is specially studying mathematics.

I found a Japanese clover flower in the park.

The depressor anguli oris is the muscle that lowers the corners of our mouth when we are sad.

She lowered her eyebrows using the depressor supercilii.

His annual income is 5 million yen.

He has Buddhism as his religion.

My income varies every month.