n. a structure in a hollow organ (like the heart) with a flap to insure one-way flow of fluid through it
n. device in a brass wind instrument for varying the length of the air column to alter the pitch of a tone
n. control consisting of a mechanical device for controlling the flow of a fluid
n. the entire one-piece shell of a snail and certain other molluscs
n. 活瓣, 阀, 活门
v. 装阀, 用阀调节
1. The mechanic fixed the leaking valve in the car.
机械师修理了汽车中漏水的阀门。
2. Please turn off the water valve before you start the repairs.
在开始维修之前，请关闭水阀。
3. The doctor explained how the heart valve works.
医生解释了心脏阀门是如何工作的。