quick·step /-ˌstɛp/
快步,快步進行曲,急拍的狐步
Quick·step n. Mus. A lively, spirited march; also, a lively style of dancing.
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quickstep
n 1: military march accompanying quick time
2: a ballroom dance with both quick and slow steps
v : perform a quickstep
[also: quickstepping, quickstepped]