He thought deeply and said, 'I think, therefore I am.'

I think an amendment to the law is necessary.

There is a need to amend the law.

There is a clear duality in his character.

It has become the year 2022 in the western calendar.

My younger sister is participating in the church choir.

The explosion of a supernova is one of the brightest events in the universe.

He is majoring in embryology at university.

Various types of living things inhabit this forest.

He will become an adult next year.