口鼻, 吻
the projecting part of the face, including the nose and mouth, of an animal such as a dog or horse
口套, 嘴套
a device, usually a strap or cage, fitted over an animal's snout to prevent it from biting or eating
枪口
the open end of a firearm, where the bullet emerges
戴口套
to put a muzzle on (an animal)
压制, 钳制
to prevent (a person or group) from expressing their opinions freely