He was involved in the development of guided missiles.

I live in Jyväskylä, a city in Finland.

He is a celebrity in Japan.

He is suffering from the misery caused by job insecurity.

Free radicals play an important role in chemical reactions.

The children are having fun playing in the playground.

Yusaku is my best friend.

I decided to take a paid leave.

Yuko is my best friend.

This species of snail is hermaphroditic, capable of self-fertilization.