And unless they had back up power generators, their lights went out on Saturday night.

除非他们有备用的发电机，否则周六晚上就会停电。

And unless they had back up power generators, they're lights went out on Saturday night.

除非有备用发电机，否则巴基斯坦会在周六晚上停电。

You had a certain amount of fixed power that was back up power.

您拥有一定数量的固定电源，即备用电源。