Polytetrafluoroethylene is a very slippery material.

I would like to visit the Great Barrier Reef once.

The Great Barrier Reef is the world's largest coral reef system.

I have been to Frankfort.

I was born in Bakersfield, California.

The retired regent prime minister, Saionji Kintsune, was a court noble and politician during the Heian period in Japan.

A statue of Saint Christopher was standing in the church.

I went to the philharmonic concert.

He kept a poker face and did not show his emotions.

It is known that this compound has different conformers.