An operator wearing earphone was sitting in the telephone exchange.

戴耳机的接线员正坐总机室里。

He constructed the first known treadmill desk along with his laptop and headset in hopes of incorporating more movement for deskbound jobs.

他制造的第一台跑步机以及笔记本和耳机，给那些室工作的人带来了更的运动机会。

Hook the bottom of the earhook onto the lower hinge pin, then lift and pull the top of the earhook over the upper hinge pin.

将耳机挂按耳机下端的扣上，从下端按扣拉起并将挂上端与耳机顶扣紧。