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单词 switch
释义
switch
(swɪ )
Word forms: switches , switching , switched
1. countable noun B1
A switch is a small control for an electrical device which you use to turn the device on or off.
Leona put some detergent into the dishwasher, shut the door and pressed the switch.
...a light switch.
Synonyms: control, button, lever, on/off device  
2. verb B2
If you switch to something different, for example to a different system, task, or subject of conversation, you change to it from what you were doing or saying before.
Estonia is switching to a market economy. [VERB + to]
The law would encourage companies to switch from coal to cleaner fuels. [VERB from noun to noun]
The encouragement of a friend spurred Chris into switching jobs. [VERB noun]
[Also VERB]
Switch is also a noun.
New technology made a switch to oil possible.
The spokesman implicitly condemned the government's policy switch.
Switch over means the same as switch.
...a professional man who started out in law but switched over to medicine. [VERB PARTICLE + to]
[Also VERB PARTICLE]
3. verb B2
If you switch your attention from one thing to another or if your attention switches, you stop paying attention to the first thing and start paying attention to the second.
My mother's interest had switched to my health. [VERB + to]
As the era wore on, she switched her attention to films. [VERB noun + to]
4. verb B2
If you switch two things, you replace one with the other.
In half an hour, they'd switched the tags on every cable. [VERB noun]
The ballot boxes have been switched. [be VERB-ed]
Synonyms: exchange, trade, swap, replace  
Phrasal verbs:
switch off
1. phrasal verb B1
If you switch off a light or other electrical device, you stop it working by operating a switch.
She switched off the coffee-machine. [VERB PARTICLE noun]
Glass parked the car and switched the engine off. [VERB noun PARTICLE]
[Also VERB PARTICLE]
2. phrasal verb
If you switch off, you stop paying attention or stop thinking or worrying about something. [informal]
Thankfully, I've learned to switch off and let it go over my head. [VERB PARTICLE]
You may find you've got so many things to think about that it's difficult to switch off. [VERB PARTICLE]
switch on
phrasal verb B1
If you switch on a light or other electrical device, you make it start working by operating a switch.
She emptied both their mugs and switched on the electric kettle. [VERB PARTICLE noun]
He pointed the light at his feet and tried to switch it on. [VERB noun PARTICLE]
[Also VERB PARTICLE]
switch over
1. phrasal verb B2
If you switch over when you are watching television, you change to another channel.
I just happened to switch over although I haven't been watching the tennis. [VERB PARTICLE]
Let's switch over to Channel 4. [VERB PARTICLE + to]
2.  switch [sense 2]
Collocations:
control switch
A three position tone control switch was provided.
Retrieved from Wikipedia CC BY-SA 3.0
The control switch for electric wipers will generally be found on the driver's console.
Retrieved from Wikipedia CC BY-SA 3.0
A separate radio control switch stopped the radio signal from broadcasting while the clock continued to move.
Retrieved from Wikipedia CC BY-SA 3.0
Flashlights may be tested for impact resistance, water and chemical resistance, and for the life span of the control switch.
Retrieved from Wikipedia CC BY-SA 3.0
Demand response places the on-off switch in the hands of the consumer using devices such as a smart grid controlled load control switch.
Retrieved from Wikipedia CC BY-SA 3.0
network switch
A sending station (computer or network switch) may be transmitting data faster than the other end of the link can accept it.
Retrieved from Wikipedia CC BY-SA 3.0
Modern wired networks use a network switch to eliminate collisions.
Retrieved from Wikipedia CC BY-SA 3.0
Lines patched as data ports into a network switch require simple straight-through patch cables at each end to connect a computer.
Retrieved from Wikipedia CC BY-SA 3.0
This requires integration with network switch manufacturers, firewall vendors, and vendors who design management consoles to create infrastructure that supports encrypted roaming communication.
Retrieved from Wikipedia CC BY-SA 3.0
A useful analogy: one can regard an expander as akin to a network switch in a network, which connects multiple systems using a single switch port.
Retrieved from Wikipedia CC BY-SA 3.0
switch tactics
Or how to switch tactics seamlessly during the match.
The Sun
As a result, it appeared to switch tactics.
Times, Sunday Times
It has a strong track record over the past five years and the ability to switch tactics if stock markets go into reverse.
Times, Sunday Times
As they tried to switch tactics, they have been unable to get themselves on an upwards curve.
The Sun
The new offensive comes amid concerns in the hunting fraternity that protesters are planning to switch tactics and target small hunts that have previously escaped close attention.
Times, Sunday Times
throw a switch
And put someone in charge with the courage to know when to throw the switch.
Times, Sunday Times
The conductor will step off and throw the switch to allow the train to back into the roundhouse.
Retrieved from Wikipedia CC BY-SA 3.0
One of the conductors will jump off the train and throw the switch to allow the train to back to the roundhouse.
Retrieved from Wikipedia CC BY-SA 3.0
Some time later, as if someone had thrown a switch, the flies stopped hatching, the chub went down and all activity ended.
Times, Sunday Times
It was as if she had thrown a switch.
Times, Sunday Times
timer switch
There's even a timer switch you can set to plug into the best off-peak rate.
The Sun
Install a wall fan with an outside outlet and set it on a timer switch, along with the dehumidifier.
Times, Sunday Times
The operator may use a manual switch and count off the seconds himself, or he may use an electric timer switch.
Retrieved from Wikipedia CC BY-SA 3.0
Some models have a 2x backlit exposure switch and a 10 sec timer switch.
Retrieved from Wikipedia CC BY-SA 3.0
Customers will be able to redeem the vouchers against items such as alarms, window locks and timer switches.
Times, Sunday Times
trigger a switch
Most look for a minimum saving of £50 a year to trigger a switch.
The Sun
Such devices are often placed in bait cars and configured so that observing police can trigger the switch remotely.
Retrieved from Wikipedia CC BY-SA 3.0
During this phase, insects are responsive to external cues called token stimuli, which trigger the switch from direct development pathways to diapause pathways.
Retrieved from Wikipedia CC BY-SA 3.0
When a person touches it, it increases the capacitance and triggers the switch.
Retrieved from Wikipedia CC BY-SA 3.0
Instead, the handset contains a small magnet which triggers a switch in the phone base.
Retrieved from Wikipedia CC BY-SA 3.0
turn a switch
Would you turn the switch?
The Times Literary Supplement
The client had to turn a switch until the pictures on the screen appeared in natural colors.
Retrieved from Wikipedia CC BY-SA 3.0
Now other teams will focus on how to turn the switches on or off by manipulating them in the lab or using treatments.
The Sun
Turn it on, the lid opens, a hand appears, turns the switch off and retreats back into the box.
Times, Sunday Times
It turned a switch in me.
The Sun
wall switch
In his house, of course, everything operates at the touch of a wall switch.
Times, Sunday Times
Ordinarily, the local push button of a wall switch module simply offers on/off control with no possibility of locally dimming the controlled lamp.
Retrieved from Wikipedia CC BY-SA 3.0
Electric garden lanterns are usually controlled from inside a building by a wall switch, or by a photoelectric sensor attached to the lamp or nearby.
Retrieved from Wikipedia CC BY-SA 3.0
Wall switch modules may not offer this feature.
Retrieved from Wikipedia CC BY-SA 3.0
Translations:
Chinese: 开关, 转变
Japanese: スイッチ, 変える
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更新时间:2025/2/4 7:35:05