rapidity

例句：

1. 1.The car accelerates to full speed on the highway.
   汽车在高速公路上全速前进。
2. 2.The bird flew quickly across the sky.
   鸟迅速地飞过天空。
3. 3. The team's performance was rapid and impressive.
   团队的表现迅速而令人印象深刻。