Oleum is a very dangerous chemical, and it requires great caution when handling.

Please throw the leftover food in the triangular sink basket in the kitchen.

Sodium carbonate is often used in the manufacture of detergents and glass.

Carbonate of soda is a versatile substance that can be used for laundry and cleaning.

I made an appointment at the department of obstetrics and gynecology for tomorrow.

My father is spreading phosphate fertiliser in the field.

Essential amino acids cannot be produced by the human body, so they need to be obtained from the diet.

He is my best companion.

This offspring cannot yet be separated from its mother.

A new character has joined our team.