快慢

例句：

1. 1. Thecar is moving at a fast speed.
   汽车以很快的速度行驶。
2. 2. I need to finishmy work quickly before the deadline.
   我需要在截止日期前完成工作。
3. 3. Themarathon runners arerunning slowly compared to other athletes.
   马拉松跑者与其他运动员相比跑得较慢。