In meteorology, an isotherm refers to a line on a map that indicates the same temperature.

He is in command of the team.

He has the ability to command the troops.

His clear and penetrating thought greatly contributed to problem solving.

His explanation was perfectly clear.

The Dongsha Islands, also known as Tōsa Shotō, are beautiful islands located in the South China Sea.

He remembered the guillotine from the time of the French Revolution.

The only thing I could rely on in the room was a single lamplight.

A mantis catches its prey with its long forelegs.

Inside the cinema, the arc lamp was shining brightly.