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stand-by(expedition)pump的英文翻譯是什么意思，詞典釋義與在線(xiàn)翻譯：
英英釋義
名詞 standby:
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something that can be relied on when needed
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an actor able to replace a regular performer when required
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not act or do anything
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be available or ready for a certain function or service
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be loyal to
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ready for emergency use
