He had to change schools due to his family's circumstances.

All members of our team are experts.

I can't understand his likes and dislikes.

The statute of limitations has already expired for that case.

There is a math quiz tomorrow.

We need to deeply consider that issue.

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.