名词快速，迅速
名词
1. I was surprised by the speediness of their arrival.
他们的迅速到来出乎我的意料之外。
speediness
1. 快速：speedily 赶紧 | speediness 快速 | speeding 超速行驶
2. 快速/迅速：speedily /赶紧/快快地/ | speediness /快速/迅速/ | speedomax /电子自动电势计/
3. 快速; 迅速 (名)：speedily 迅速地, 立即, 快 (副) | speediness 快速; 迅速 (名) | speeding 超速行驶 (名)
1. Previously it was impossible to photograph electrons because of their extreme speediness, so scientists had to rely on more indirect methods.
speediness
noun