He found out the truth and was surprised.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

He solved the problem using that technique.

He is learning the art of painting.

He defeated the enemy using that technique.

This company strictly adheres to the principle of fair trade.

You can solve the problem by using this method.

He saved money using the 'hou' (alternative spelling of 'fran') to go to France.

He couldn't say anything about issues outside of his field of expertise.

There are many different specialty stores in this town.