His mettle shows that he never gets discouraged even in difficult situations.

This area has a strong miasma, and there is a possibility that you may feel sick if you stay for a long time.

This steam locomotive reminds us of the old times.

It seems like something is stuck in his trachea.

There is an evil aura around him.

The air in this room is fresh.

The morale of this team is very high.

He tackled the new project with courage.

The weather today is very good, isn't it?

I like to fly balloons in the park.