Proportional representation is an important system to ensure the fairness of elections.

My company has introduced a layoff system.

Primitive communism is one of the initial forms of human social organization.

The system of provinces was a part of the ancient political system in Japan.

We should always remember the power of Kannon in difficult times.

He trains his deltoid muscles at the gym every day.

He is doing special exercises to strengthen his cervical muscles.

She was massaging her nape.

He has strong masseters, so he can easily bite through hard food.

If your muscles of mastication are strong, you can chew food more efficiently.