percussion

n 1 [U] (a) striking of two (usu hard) objects together 两物相撞（通常指硬物）. (b) sound or shock that is the result of this 碰撞发出的声音或震动. 2 [U] method of playing a musical instrument by striking it with another object （打击乐器的）演奏（法）, 打击. 3 the percussion [pl v] (alsoper`cussion section) (players of) percussion instrumentsin an orchestra （管弦乐队的）打击乐器（的演奏组）. =>illus at App 1 见附录1插图, page xi. 4 [U] (medical 医) gentle tapping of the surface of the body as part of a medical examination 叩诊.

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