The Earth revolves around the sun in a fixed orbit.

Shouko took her child to the park.

This used car is very cheap.

He is an old acquaintance.

He is always irritated because everything is annoying to him.

She dyed her hair blue.

His blood congealed with fear.

He goes fishing in the sea every day.

In linear algebra, the upper triangular matrix plays a very important role.

By regularly checking the key performance indicators, you can understand the performance of the company and devise improvement measures.