The single transferable vote is an important means to ensure the fairness of elections.

Demography is an important tool for understanding various aspects of society.

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

Dou is a popular dancer.

He trampled on my heart.

He prostrated before the king to show respect.

He bought a new leather jacket.

The United Nations Environment Programme is providing solutions to global environmental problems.

He is world-famous as a comparative linguist.

He got a four of a kind in poker.