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TOEFL IELTS BNC: 5887 COCA: 6557

velocity

ve·lo·ci·ty /vəˈlɒsəti $ -ˈlɑː-/ ●○○ noun (plural velocities)  
1 [countableC, uncountableU] technical the speed of something that is moving in a particular direction 速度
 the velocity of light
光速
 The speedboat reached a velocity of 120 mph.
快艇的时速达到了120英里。
 a high velocity bullet
高速子弹
2 [uncountableU]FAST/QUICK a high speed 高速
 Martinez had good velocity on his fastball.
马丁内斯的快球速度极快。
Examples from the Corpus
From Longman Business Dictionary
velocityve·lo·ci·ty /vəˈlɒsətivəˈlɑː-/ noun [uncountableU]
ECONOMICS the number of times a particular unit of money is spent over a period of time. A country’s GDP is the total amount of money available and its velocity
Unless there is a sharprise in velocity, a more inflationary monetary policy would be appropriate.
Origin velocity
(1500-1600) French vélocité, from Latin velocitas, from velox fast
ve·lo·ci·ty noun
Chinese
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