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》

Press heat preservation switch to light up the indicating lamp, the water kettle will start heat preservation.

按下保温开关，保温指示灯亮，水壶开始保温。

youdao