The mechanism of this clock is very complex.

He applied the theory to a practical problem.

You can apply this theory to actual problems.

This application is very convenient.

He has a generous personality and is kind to everyone.

He likes taking photographs.

Climate change is a global issue.

There are many stomata on the leaves of this plant.

Leaves of plants have stomata, which allow for gas exchange.

He was behaving like a young nobleman.