He walked down the public street towards school.

In mathematics, equivalence classes are a very important concept.

Orion is one of the brightest constellations in the night sky.

Do you know whether he is coming or not?

What's up, you look pale.

Adding green peas to the salad makes it colorful.

Endo is my best friend.

What do you think of his ways to rule?

In this chemical reaction, an isotope is produced.

How about trying a new restaurant?