请你开机电脑。
qǐng nǐ kāijī diànnǎo 。
Please start up the computer.
他早上六点就开机了。
tā zǎoshàng liù diǎn jiù kāijī le 。
He started up the machine at six in the morning.
我们要等到动设备开机。
wǒmen yào děngdào dòng shèbèi kāijī 。
We need to wait until the equipment starts up.