He is battling a chronic illness.

The development process of the embryo is very complex.

The development process of an embryo is very complex.

He found hair growing on the flesh of his big toe.

He is scheduled to have bladder surgery.

He has weak lungs, so he takes care of his health.

He is suffering from lung cancer.

This 轘 is a symbol of ancient China.

He was playing a drum named 駴.

His car is gray.