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n.阀( valve的名词复数 )；真空管；（管乐器的）活栓；（心脏的）瓣膜 英英释义： valven.a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through itdevice in a brass wind instrument for varying the length of the air column to alter the pitch of a ton
