n.头戴式耳机
Invest in a telephone headset for your office phone. 在你办公室的电话机旁安装一个头戴式耳机。
A headset is a handset that fits on your head, an earpiece is one that fits on your ear. 头戴式耳机是戴在头上的听筒，耳机则是戴在耳朵上的听筒。
