Usage note
开机是指启动电子设备的过程，比如电脑、电视或手机。
kāi jī shì zhǎng tào diàn nǐ qí bù sè de guò chéng, rú kě dian nǐ、diàn shì huò qiú shǒu jī。
开机 refers to the process of starting up electronic devices, such as computers, TVs, or phones.
Context note
开机通常在日常生活中使用，比如早上打开电脑开始工作或晚上关掉电视休息。
kāi jī tōng cháng zài rì chén shēn zhōng sòng yòng, bǐ 如 早 上 dǎ kāi diàn nǐ kěngiè 开 始 gōng zuò huò 晚 上 guāi diàn shì 戒 休息。
开机 is commonly used in daily life, such as turning on the computer to start work in the morning or switching off the TV before going to bed at night.
5 examples
早上我开机了电脑。
zǎo shàng wǒ kāi jī le diàn nǎo。
In the morning, I turned on the computer.
妈妈让我开机看电视。
mā ma ràng wǒ kāi jī kàn diàn shì。
Mom asked me to turn on the TV to watch it.
我忘记开机了，手机没电了。
wǒ wàng jì kāi jī le， shǒu jī méi diàn le。
I forgot to turn on my phone; it ran out of battery.
开机后请检查网络连接。
kāi jī hòu qǐng jiǎn chá wǎng luò lián jiē。
Please check the network connection after turning on.
不要在开机时插拔电源线。
bú yào zài kāi jī shí chā bá diàn yuán xiàn。
Do not plug or unplug power cords while the device is on.
5 mini stories
早上我开机了电脑，开始工作。妈妈让我开机看电视。
zǎo shàng wǒ kāi jī le diàn nǎo， kāi shǐ gōng zuò。 mā ma ràng wǒ kāi jī kàn diàn shì。
In the morning, I turned on the computer to start working. Mom asked me to turn on the TV to watch it.
我忘记开机了，手机没电了。爸爸帮我开机，然后打电话给朋友。
wǒ wàng jì kāi jī le， shǒu jī méi diàn le。 bà ba bāng wǒ kāi jī， rán hòu dǎ diàn huà gěi péng yǒu。
I forgot to turn on my phone; it ran out of battery. Dad helped me turn it on and then called a friend.
开机后请检查网络连接。我忘记开机，电脑没有上网。
kāi jī hòu qǐng jiǎn chá wǎng luò lián jiē。 wǒ wàng jì kāi jī， diàn nǎo méi yǒu shàng wǎng。
Please check the network connection after turning on. I forgot to turn on my computer; it couldn't go online.
不要在开机时插拔电源线。我妈妈提醒我，这样可能会损坏电脑。
bú yào zài kāi jī shí chā bá diàn yuán xiàn。 wǒ mā ma tí xǐng wǒ， zhè yàng kě néng huì sǔn huài diàn nǎo。
Do not plug or unplug power cords while the device is on. My mom reminded me that doing so might damage the computer.
开机时要轻按电源键，不要用力过猛。我有一次不小心按坏了。
kāi jī shí yào qīng àn diàn yuán jiàn， bú yào yòng lì guò měng。 wǒ yǒu yí cì bù xiǎo xīn àn huài le。
When turning on, gently press the power button; don't apply too much force. I accidentally damaged it once by pressing too hard.
Mini dialogue
电脑开机
A
妈妈，可以帮我开机吗？
Māma, kěyǐ bāng wǒ kāijī ma?
Mom, can you help me turn on the computer?
B
好的，按这个按钮就开机了。
Hǎo de, àn zhège ànniǔ jiù kāijī le.
Okay, press this button and it turns on.
手机开机
A
你的手机怎么黑屏了？
Nǐ de shǒujī zěnme hēi píng le?
Why is your phone screen black?
B
没电了，我刚开机。
Méi diàn le, wǒ gāng kāijī.
It ran out of battery. I just turned it on.
Related words and contrasts
opposite
关机
guān jī
turn off
开机 means to turn on, 关机 means to turn off.
similar
启动
qǐdòng
start up
启动 is a more formal way to say start a machine.