n. understudy
瞧,这就是预备人员地基,框架和屋顶。
Look, this is a prep crew. The foundation, the frame and the roof.
这儿有超过100名以上的陆军和海军陆战队预备人员在此工作。
More than 100 Army and Marine Corps Reserve personnel staff the facility.
官方的预警及预备措施旨在减少人员损失,他说。
The point of the official warnings and preparation was to save lives, he said.
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