... stand-by time 停止时间 stand-by unit 备用装备 stand-by 后备的 ...
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... stand-by unattended time 准备就绪但无人管理的时间 stand-by unit 备用机组 stand-by 等待 ...
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stand by unit 备用机组
stand-by power unit 备用发电机组
stand by pumping unit 备用泵组
stand-by automatic air braking unit 备用自动空气制动
·2,447,543篇论文数据，部分数据来源于NoteExpress
Higher density stands reach quatitive maturity earlier than lower density stands, the annual stem volume produced by unit land area of higher density stand is larger than that of lower density stands.
随着密度的增加，林分达到数量成熟期的年限变短，若以数量成熟期为采伐年限，则单位面积年均材积产量仍以高密度林分为最大。
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