Ta decided to remove unnecessary things to clean his room.

In response to the enemy's attack, we are considering a retreat.

An intercontinental ballistic missile is a weapon with a very large destructive power.

Alternating hot-cold baths have the effect of improving blood circulation in the body.

This table is completely flat.

It is important to learn about the prevention and treatment of the human immunodeficiency virus.

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.

Before starting a new business, he said, 'Nothing ventured, nothing gained.'