旋钮

This knob is only held on by sellotape.

这个钮只是用透明胶带固定住的。

This machine has lots of knobs on it. Which one starts it?

这机器有多钮。哪一个是启动它的？

Turning the knob fully counterclockwise (to OFF) allows the gate to pass signals unattenuated, effectively bypassing the gate.

逆转钮直到OFF,这样，允信号毫无衰减地通，有地直通。

My radio's knob got loose.

我收音机上的钮松动了。