幸好停电时备用系统运转正常。

幸好停电时备用系统运转正常。

It's a good job the backup system worked during the power outage.

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It's a good job the backup system worked during the power outage.

it's 是 it is 的缩写。 a 是不定冠词。 good 是形容词,意思是"好的"。 job 在这里不是"工作",而是指"事情"或"情况"。 it's a good job 是一个固定搭配,意思是"幸好"或"幸运的是",用来庆幸某件积极的事情发生了。

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