英语释义
1
n distance travelled per unit time
2
n a rate (usually rapid) at which something happens
3
n changing location rapidly
4
n the ratio of the focal length to the diameter of a (camera) lens system
5
n a central nervous system stimulant that increases energy and decreases appetite; used to treat narcolepsy and some forms of depression
9
v travel at an excessive or illegal velocity
10
v cause to move faster