He knows that pain through his own experience.

He is feigning ignorance about that problem.

In order to understand his feelings, I had a deep conversation with him.

God only knows what he is thinking.

I have no way of knowing what he is thinking.

He is working hard to make his abilities known to the world.

He is learning Ancient Greek language.

Shimeji mushrooms grow naturally in my garden.

This culture medium helps the growth of bacteria.

In my district, a summer festival is held every year.