Good and evil coexist in the human heart.

He is a graduate student at the University of Tokyo.

This detailed plan was the key to his success.

What are the ingredients of this product?

I decided to take a painkiller because I have a severe headache.

The speed limit on this road is 60 kilometers per hour.

My mother was surprised when she saw my report card.

He publicly admitted that he is a bisexual.

The sinusoid is used to represent many phenomena in nature.

His standard of living has improved significantly.