名詞 swiftness:

1. a rate (usually rapid) at which something happens
   同義詞：speed, fastness

1. Rapidity or speed of motion; swiftness.
   迅速，快速運動的快速或速度; 迅速
2. Swiftness of action or motion; speed.
   迅速行動或移動敏捷; 速度
3. His reaction of swiftness surprised us.
   他迅速的反應讓我們吃了一驚。
4. We condemned the violence in swiftness.
   我們立即譴責了那種暴行。