He learned how to operate the anti-tank gun.

His efforts were like a mantis trying to stop a chariot, he couldn't achieve any results.

He is attending school to obtain a motorcycle license.

The United Nations Security Council plays a crucial role in maintaining world peace and security.

His father fell into a persistent vegetative state due to a traffic accident.

Basic oxides react with acids to produce salt and water.

It is important for us to respect cultural diversity and understand each other's differences.

This area is affected by radioactive fallout from past nuclear tests.

She was diagnosed with polycystic ovary syndrome.

This area is seriously contaminated with radioactive isotopes.