He is still in his tsun phase, so he doesn't talk much.

She has been cranky since this morning.

Let's make a plan for the next term.

The exam period is very busy.

The new season of my favorite television show has started.

She really suits her blunt bangs.

This invention brought about an epoch-making advancement in science and technology.

"Once in a lifetime" means to cherish the encounter that happens only once in one's lifetime.

He missed a once-in-a-lifetime opportunity.

The story of the time of creation is mysterious and interesting.