Singapore is a prosperous city state.

He experienced the Urashima effect due to space travel.

Jokou is my best friend.

This polynomial is represented in descending powers.

The patrol is scouting for enemy movements.

Each of A, B, C, and D has different characteristics.

He is working as a stonemason.

The time it takes for the Earth to orbit the Sun is called a sidereal year.

My younger sister is in her second year of senior high school, and she is busy studying every day.

I learned the alphabet in the order of ABC.