on-off

n.

开关；通断；

on-off control开关控制；双位调节；继电器式控制

on-off valve开关阀；双位阀

on-off switch[电]通断开关；换向开关；双位开关

1. You see this little switch on the back.
   你看看背后的这个小开关。
2. He turned on the switch and cut in the automatic pilot.
   他打开开关，接通自动驾驶仪。

Large On-Off Ratios and Negative Differential Resistance in a Molecular Electronic Device.
A Model for Generating On-Off Speech Patterns in Two-Way Conversation
"ON-OFF"EFFECTS IN PATIENTS WITH PARKINSON'S DISEASE ON CHRONIC LEVODOPA THERAPY
On-off intermittency: A mechanism for bursting
Thermally on-off switching polymers for drug permeation and release
The "on-off"phenomenon in Parkinson's disease. Relation to levodopa absorption and transport.
Morphology of on-off direction-selective ganglion cells in the rabbit retina.
Blowout bifurcations: the occurrence of riddled basins and on-off intermittency
NK cell education: not an on-off switch but a tunable rheostat.
Hg2+-selective OFF-ON and Cu2+-selective ON-OFF type fluoroionophore based upon cyclam.