Yes, and here we use plug to mean connect.

是的，这里我们用插头表示接通电源。

If your computer is plugged in, then everyone can get started.

如果你的电脑已经接通电源，那么每个人都可以用。

He foresees a future when electric vehicles are tapped for power when not in use.

预见未来世界，电在不用时可接通电源的。

When the power for a piece of equipment is on, it is running.

当一台设备的电源接通时，它就在运行。

After plugging the world in, Tesla began inventing a fantastical future.

在为世界接通电源后，特斯拉创造一个梦幻般的未来。

Occasionally, the problem is a bit more complex such as the computer wasn't even plugged in.

有时，问题会更复杂一些，例如计算机甚至没有接通电源。

We’ve got a CD player, but it’s not hooked up yet.

【hook】我们有一台CD唱片播放机，不过还没有接通电源。