He is excited about living in outer space.

The concept of topological space plays an important role in many fields of mathematics.

This image is represented in the RGB color space.

The theory of metric spaces plays an important role in many areas of mathematics.

Understanding probability space is important for learning the basics of statistics.

My grandmother's forty-ninth day is next week.

My father drinks milk every morning.

He always comes late, so it's hard to wait.

She drinks milk every day to maintain her health.

He is working hard on his Japanese studies day by day.