A percussion instrument consisting of a hollow cylinder or hemisphere with a membranestretched tightly over one or both ends, played by beating with the hands or sticks.
鼓一种打击乐器，由中空的圆柱或半圆及紧绷在一端或两端的鼓膜组成，用手或棍击打演奏。
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The restoring force in a vibrating flexible membrane arises from the tension with which it is stretched.