• 1. low mass rate: 低质量流量
• 2. low mass flow rate: 低质量流速

• 1.The machine has high producing efficiency and low mass rate and un-threshing rate, which is an ideally useful assistant for the farmers.
  该机生产效益高，总损失率和未脱净率低，是农民兄弟理想的得力助手。
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• 2.This very low base-rate means that any precursors of a quake would have to be incredibly reliable if decision-makers are to feel safe in using them to order mass evacuations.
  这么低的基础概率意味着，如果要让决策者下定决心，进行大规模人口疏散的话，任何地震前兆都必须极其可靠。
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• 3.The maximal speed is primarily confined by descending rate when landing mass is low and confined by arresting distance when landing mass is large.
  对于最大着舰速度，当着舰质量较小时主要由着舰下沉速率准则决定，当着舰质量较大时主要由拦阻距离准则决定。
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