Wei An is my best friend.

My friend came from Anqing.

He found a place to ease his body in this town.

Annam is the old name of Vietnam.

He exercises every day, so he always feels well in mind and body.

Ammonium carbonate is a compound commonly used in inorganic chemistry.

Ammonium nitrate is widely used in the manufacture of fertilizers and explosives.

In chemistry class, I learned about the properties of ammonium chloride.

In this chemical experiment, we will observe the reaction using ammonium phosphate.

Anzu is my best friend.