He is conducting research on celestial bodies.

This antibody strengthens the defense against the virus.

We should respect the opinion of the whole.

He exercises every day to maintain the health of his body.

In my school, there are physical education classes every day.

Please calculate the volume of this box.

He always does his best to maintain his face.

This individual is a very rare type of butterfly.

This conductor transmits electricity very well.

His constitution makes him prone to catching colds.