rapidity

n.

迅速，急速；速度；险峻；快度

1. He walked with unusual rapidity.
   他的走路异常迅速。
2. That Beijing was stung was apparent in the rapidity of its reply.
   北京的答复异常迅速，明显地表明它被刺痛了。

Observation of rapidity gaps in p-barp collisions at 1.8 TeV.
Moments of rapidity distributions as a measure of short-range fluctuations in high-energy collisions
The relation of strength of stimulus to rapidity of habit formation in the kitten
Highly relativistic nucleus-nucleus collisions: The central rapidity region
J/psi production versus transverse momentum and rapidity in p+p collisions at square root s=200 GeV.
J/{psi} Production versus Transverse Momentum and Rapidity in p+p Collisions at {radical}(s)=200 GeV
High-precision QCD at hadron colliders: electroweak gauge boson rapidity distributions at NNLO
J/psi production versus centrality, transverse momentum, and rapidity in Au+Au collisions at square root sNN=200 GeV
High-precision QCD at hadron colliders: Electroweak gauge boson rapidity distributions at next-to-next-to leading order
J/{psi} Production versus Centrality, Transverse Momentum, and Rapidity in Au+Au Collisions at {radical}(s{sub NN})=200 GeV