The external anal sphincter plays a crucial role in helping us control defecation.

I use hair tonic every night.

Because he received Spartan education, he has a very strict character.

My commuter pass expires next week.

Above all, grammar is the most important in learning Japanese.

He was surprised when he saw the list of nuclear powers.

Universal gravitation is at work between the Earth and the Moon.

In order to solve this quantum mechanics problem, we need to find the eigenfunction.

Scientists are developing a new type of fusion reactor.

She said 'to each his own', respecting the differences among people.