In this chemical reaction, ammonium is produced.

We need to minimize the system's downtime.

Her contours were beautiful, capturing the heart of the artist.

He played a character who surpasses his own limits.

He was imprisoned as a political offender.

He answered wrong in the test.

This plant has withered due to lack of water.

With old age, his eyesight gradually deteriorated.

This ancient proverb, 'know the other side and yourself, and you will not be in danger in a hundred battles', teaches us the importance of understanding ourselves and others.

The human immunodeficiency virus destroys the immune system, making the body unable to fight disease.