Our host ran a long extension cord out from the house and set up a screen and a projector.

我们的主人从那所房子里牵出了一条长的延长导线，安置了一块屏幕和一个投影仪。

The lowly extension cord.

普通的延长线。

Extension cord wiring a safety hazard.

延长线和配线混在一起，很危险。

I got tripped up by the extension cord.

例如我被延长线绊倒了，就是。

At least 25 'heavy duty power extension cord.

至少25英尺长的加强型外接电源线。