Very fast; happening or moving quickly.

• Occurring or developing in a short time.

非常快的；发生或移动迅速的。

• 在短时间内发生或发展的。

Steep in gradient; changing elevation quickly.

坡度陡峭的；高程变化快的。

A rough, turbulent stretch of a river with swift flow.

河流中湍急、起伏的水段。

Chess played at a faster time control; rapid chess.

用较短用时进行的国际象棋；快棋。