one to zero ratio 一与零比
zero air void ratio 饱和孔隙比
zero cross ratio 过零率
zero output ratio 零位输出百分比
zero power resistance ratio 零功率电阻比
zero-pass ratio 过零率
zero-cross ratio 过零率
zero poisson ratio 零泊松比材料
zero sequence current ratio 零序电流比值
Cost-benefit ratio criterion----No activity where the present value of net benefits is less than zero should be taken.
成本效益分比率准则——净利润现值低于零的无活力地区应该被承揽。
The conclusion is: a practical beam expanding telescope has maximum beam expanding ratio when its maladjustment is zero.
其结论为一个实用的扩束望远镜在失调量为零时，具有最大的扩束比。
It also raises the question regarding the ratio of zero credit hour.
提出关于零课时学分所占比例问题。
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