旋钮

This knob is only held on by sellotape.

这个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。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.

逆时针直到OFF,这样，允信号毫无衰过，有效直。

My radio's knob got loose.

我收音机上的松动了。