He suffered from oxygen deficiency while climbing the mountain.

He is facing many difficulties due to gender identity disorder.

He ordered red wine.

He ordered white wine.

My father was diagnosed with uveitis.

He is majoring in oenology.

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

The concept of chemical equivalent is essential for understanding chemical reactions.

My company specializes in the manufacture of fine chemicals.

Chemotransmitters play an important role in the transmission of information between nerve cells.