New Words：

plug [plʌg] n. 塞子；插头
wire ['waiə] n. 电线；导线；金属丝；金属线

Sample Sentences：

She pulled the plug to let out the water.
They used electricity from a plug in the garage.

Electricity is carried along wires.
He bent the wire into the shape of a square.
The rope was not strong enough, so we used wire.

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