Chemsex can potentially have a very negative impact on health.

He learned how to use a stone axe in his archaeology class.

He is a frog in a well, not understanding how vast the world is.

He couldn't escape from the pursuer.

He is an expert in petrochemistry.

Sexual abuse is an act that is absolutely not allowed.

Tridymite is a mineral that is formed at high temperatures.

The World Bank is an international institution that supports economic development around the world.

He tied a red rope at the shrine.

He was forcibly expelled from school.