swiftness
noun /ˈswɪftnəs/
/ˈswɪftnəs/
[uncountable]- the fact of happening or being done very quickly or in a very short time
迅速：在非常短的时间内很快发生或完成 - He moved with surprising swiftness for a man of his age.
对他这个年龄的人来说，他的动作快得惊人。 - These technological changes happened with astonishing swiftness.
这些技术变革以惊人的速度发生。
- He moved with surprising swiftness for a man of his age.