phrasal verbphr vSWITCH ON OR OFFto switch something on or off, or to switch on or off 开/关〔某物〕
A light snapped on in one of the huts.
其中有一间小屋的灯亮了。
snap something ↔ on/off
Kathy snapped off the light.
凯西把灯关掉。
Examples from the Corpus
snap on/off• The light trained on his bedsnaps off.• The satellite and more than 12 miles of tetherlinking it to Columbia snapped on Feb. 25.• His tormentors had snapped off the lights as they wished him goodnight, and it was completely dark.