Strong interaction is one of the four fundamental forces in particle physics.

He is preparing his luggage for going north.

We are planning to go north tomorrow.

I use a set square to draw shapes.

This wine is of the highest quality.

The day before yesterday, I went to see a movie with my friend.

He was forced to quit sports for medical reasons.

He has a gentle and sincere personality, and is trusted by everyone.

I have three meals a day.

I have a meal three times a day.