The NGK battery is a cylinder with sodium in the center, separated from molten sulfur by a ceramic membrane that allows the passage of sodium ions to create the battery's current.
日本研究理事会生产的电池是圆筒状的，中心里的钠由一个允许钠离子通过而产生电流的陶制薄膜分开。
A percussion instrument consisting of a hollow cylinder or hemisphere with a membrane stretched 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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