light switch
collocation电灯开关
He flicked the light switch and the room lit up.
他拨动电灯开关，房间亮了起来。
开关
先理解核心含义，再看它在真实句子里的用法。
开关
A device used to turn electric current on or off, or to control the flow of current in a circuit.
Could you flip the switch by the door? The basement is dark.
你能按一下门边的开关吗？地下室很黑。
指电灯、电器等的通断装置
用于开启和关闭电流或引导电流流动的装置
A device to turn electric current on and off or direct its flow.
开关
control consisting of a mechanical or electrical or electronic device for making or breaking or changing the connections in a circuit
改变或交换
A change or exchange.
替换
an event in which one thing is substituted for another
The main power switch is located behind the machine.
主电源开关位于机器后面。
I bought a new switch for the lamp because the old one stopped working.
我给台灯买了一个新开关，因为旧的坏了。
Choose the next layer that will help you use switch with more confidence.
Recommended next
Missing: Usage patterns
Complete this area with usage patterns.
Includes Common mistakes & Confusing words
See typical errors learners make and confusing words to avoid.
Focus on the distinctions below. Other candidates are kept compact until a reliable usage note is available.
电灯开关
He flicked the light switch and the room lit up.
他拨动电灯开关，房间亮了起来。
电源开关
Please turn off the power switch before leaving.
离开前请关闭电源开关。
开/关
The on/off switch is located on the side of the device.
开/关位于设备侧面。
开关面板
The electrician replaced the old switch panel.
电工更换了旧的开关面板。
开关盒
The switch box is inside the closet.
开关盒在壁橱里。
开关位置
Make sure the switch position is set to 'on'.
确保开关位置设置为“开”。
突然改变（尤指情绪或行为）
He can flip a switch from being friendly to being cold.
他能突然从友善变得冷漠。
好像开关被打开了一样（形容突然变化）
As if a switch had been flipped, the crowd went silent.
好像开关被打开了一样，人群突然安静下来。
触发开关（常比喻启动某事）
We need to hit the switch on this project soon.
我们需要尽快启动这个项目。
随心切换，随时畅玩！
The Nintendo Switch console encourages you to switch and play anywhere.
任天堂Switch游戏机鼓励你随心切换，随时畅玩。
切换，切换，切换（我亲自上阵）
In Iggy Azalea's song 'Switch', she repeats 'switch' to emphasize changing things up.
伊基·阿塞莉娅的歌曲《Switch》中重复'切换'来强调改变。
Use switch naturally, then get feedback on meaning, tone, grammar, and phrasing.
Revisit a common error or keep this word in your review list.
switch = 开关，一拨就切换。
作为名词时，通常指电路开关，语域中性，常见于家庭电路、电子设备和工业控制面板等场景；较少用于表示替代事件或假发套。
可数名词；常与'on/off'搭配使用。
Dictionary facts from ECDICT, WIKTIONARY.