Obtain a lightbulb, a wire, and a battery.

取一个灯泡、一段导线和一节干电池。

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When a lightbulb burns out, we rarely give it a second thought.

当一个灯泡烧掉了，我们很少会在它身上再去多费心思。

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When a lightbulb burns out, we rarely give it a second thought.

当一个灯泡烧掉了，我们很少会在它身上再去多费心思。

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