The teacher wrote the problem on the blackboard.

This museum exhibits old photos printed in collotype.

May his health last for an extremely long period of time.

This beautiful blue crystal is called chalcanthite.

I saw a coot in the park.

My new keyboard is very easy to use.

This law applies to all the people.

I wrote a new message on the bulletin board.

Pyxis is one of the constellations in the southern hemisphere.

He is scheduled to pitch in tomorrow's game.