He will not appear on stage in today's performance due to poor health.

We have a game at the baseball ground on the weekend.

The Earth is not perfectly spherical.

Seeing his troubled situation, I offered to help.

This computer operates in nanoseconds.

He is a doctor, but I am a student.

C++ is a very powerful programming language.

Many insects live in the vicinity of the roots of this tree.

Nakata is my best friend.

This person is my new friend.