He knocked on the door over and over again.

Would you like to go to the movies tonight?

I brought a compass so I wouldn't get lost in the mountains.

All things in this world are always changing.

He fell into a critical state of life due to an accident.

My favorite vegetable is tomato.

He called me back immediately after he hung up the phone.

This compound crystallises when cooled.

Through this chemical reaction, the substance crystallises.

The shape of this crystal lattice is very unique.