备用
(備用)to spare; to keep for future use
Example Sentences
医院的重要科室均配备了应急发电机组，以备停电时作为备用电源。
yī yuàn de zhòng yào kē shì jūn pèi bèi le yìng jí fā diàn jī zǔ, yǐ bèi tíng diàn shí zuò wéi bèi yòng diàn yuán.
Important departments of the hospital are equipped with emergency generator sets to serve as backup power in case of power outage.
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