Press down and hold the tuningknob and lamp button while turning on the radio.
保持钮的按住状态，将按钮和轴拉出开关。
2
Varying the voltage or the distance between the ground plate and the graphene alters the conductivity, "just like tuning a knob," Engheta said.
改变电压或是接地板与石墨层之间的距离都能改变传导率，“就像调节旋钮一样”，Engheta说。
3
When radios were first put in automobiles, we all discovered that manually tuning an analog radio with a rotating knob while driving was dangerous to your health.