His posture is very good.

This equation has homogeneity.

I am planning to go to Xi'an next week.

As an astronomer, he discovered a new star cluster.

A jellyfish is one of the beautiful creatures of the sea.

He ordered a highball.

The activity of brain cells directly affects our thoughts and actions.

I decided to keep a housekeeping book to understand my monthly income and expenses.

The cell membrane plays an important role in maintaining the structure of the cell.

I bought a new swim cap.