remarkable swiftness 卓越的敏捷
with swiftness 迅速地
the swiftness of the response 反应的迅速
A: Did you notice the swiftness of the courier?
A：你注意到快递员的速度很快吗？
B: Yes, he arrived just minutes after I ordered.
B：是的，我下单后几分钟他就到了。
1) 速度
2) 敏捷
3) 及时
1. 速度；敏捷；迅速
noun
1. The quality of moving or happening very quickly.
Synonym: speed, rapidity, quickness