He warned the young people, saying 'At thirty, one should not be careless, at forty, one should not be indecisive.'

An intercontinental ballistic missile is a weapon with a very large destructive power.

The launch of intercontinental ballistic missiles has become an international issue.

The intertransversarius muscle is an important part of our body, especially part of the back muscles.

His actions always have a duality.

My room number is two hundred and five.

He defeated the enemy using a two-sword style.

He holds dual citizenship in America and Japan.

Carbon dioxide is one of the main causes of global warming.

This factory is emitting a large amount of sulfur dioxide.