He snatched up the receiver and his free hand groped for the switch on the bedside lamp.
他一把抓起听筒，空着的手则摸索着找床头灯的开关。
《柯林斯英汉双解大词典》
2
When children saw this they did not imitate the behavior, instead they just pressed the lampswitch with their hands.
当小孩子们看到了这一幕，他们不会模仿这一行为，反而直接用手按下台灯开关。
3
When he flicks the switch and turns on his lamp, a sensor on his desk downloads music tracks digitally encoded within tiny flickers in the lamp's light.