電線は電気を流す。

electric line; electric cable; power cable; telephone line; telegraph wire

topic marker particle; indicates contrast with another option (stated or unstated); adds emphasis

electricity; (electric) light

indicates direct object of action; indicates subject of causative expression; indicates an area traversed; indicates time (period) over which action takes place; indicates point of departure or separation of action; indicates object of desire, like, hate, etc.

to drain; to pour; to spill; to shed (blood, tears); to wash away; to distribute (e.g. electricity over wires, music over a PA system, etc.); to circulate; to broadcast; to beam; to cruise (e.g. taxi); to float; to set adrift; to call off (a meeting, etc.)