The single win betting system is about predicting which horse will reach the goal first.

In chemistry, we use projections to represent the shape of molecules.

It's difficult to solve this monomial expression.

He is brushing his lower teeth.

He smiled, showing his lower teeth.

She seemed nervous, biting her lower lip.

She seemed nervous, biting her lower lip.

He was complaining about pain in his armpit.

I plan to spend the afternoon at the library.

The emperor issued an order to the entire army to start the attack.