The ear is the part of the body which allows animals (including people) to hear. People and most mammals have ears. Non-mammals can also hear, but may have holes instead of external ears. The ear works by directing sound to the inner ear. These vibrations are sent to the brain by a network (organized group) of nerves. The whole system is called the auditory system.

耳朵 是 让 动物(包括 人)能听到的 身体部位。人 和 大多数 哺乳动物 都 有 耳朵。非哺乳动物 也 可以 听到,但 可能 有 洞 而 没有 外耳。耳朵 通过 将 声音 引导 至 内耳 来 运作。这些 振动 通过 神经网络(有系统的 组织)发送 到 大脑。整个 系统 被称为 听觉系统。