My grandfather contracted poliomyelitis when he was young.

Japan's exclusive economic zone plays a crucial role in the management and utilization of marine resources.

Rui is accumulating study every day.

He quoted the proverb 'Once a word leaves your mouth, you cannot chase it back even with the swiftest horse' to teach me to choose my words carefully.

His necklace is made of pure silver.

He was known as a bully at school.

I fed the pigeons in the park.

He was peeling the apple skin.

This paper is very thin.