Natural language understanding is an important field of artificial intelligence.

He is attending a programming school to learn object-oriented languages.

My class starts at eleven o'clock.

I eat lunch at twelve o'clock.

Greenwich Mean Time is the standard that determines the time of the world.

In her anger, she decided to perform the ushi no toki mairi.

He has been committing misdeeds for many years, but finally the time for repayment has come.

He has a deep interest in astronomy.

He is an expert in physics.

Electromagnetism is a part of physics that studies the interaction between electricity and magnetism.