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stand·by AHD[stăndʹbī'] D.J.[ˈstændˌbaɪ]K.K.[ˈstændˌbaɪ]n.（名词）pl. stand.bys 【复数】- One that can always be relied on, as in an emergency.可依靠的人，坚定的支持者：总能被依靠的人，如在危急时刻
- A favorite or frequent choice.喜好的选择：喜爱的或频繁的选择
- One kept in readiness to serve as a substitute.替代品：后备作替身的人或物
adj.（形容词）- Kept in reserve for use when needed:应急的：被保存做急需时用的：a standby generator.一个应急发电机
- Of, relating to, or waiting for unreserved travel space that is made available by an airline only shortly before departure:等待退票（或余票）的：在飞机起飞前等待退票或未预定的票的或与之相关的：standby passengers.等退票的旅客
adv.（副词）- On a standby basis:待命：flew standby to New York.在飞往纽约空中待命
on standby - Ready and waiting.准备就绪而等待
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