I learned about bacterial culture in my microbiology class.

The Gulf of Tonkin is located in the northern part of Vietnam.

This roof is made of galvanized iron.

She can play the glockenspiel well.

He scattered caltrops on the ground.

He used a crowbar to remove the rusted bolt.

This scrap iron can be recycled.

This tin toy is old, but it still works.

He tried to open the door with an iron pipe.

He is called the iron general of chess.