Estimates with zero degrees of freedom represent the base (reference) level of an attribute.

估计用自由的零程度表现属性的基础(叁考)水平。

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The zero-sequence voltage was related to the reference voltage to balance the capacitor voltage in the H-bridge assistant inverter to ensure hybrid 9-level operational security.

的零序电压与参考电压以平衡的H-桥助理逆变器中的电容器电压，以确保混合9级别的操作安全性。

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Sets a technical zero at a level of 0.1 % - the lowest level of GM material considered by the EU Reference Laboratory for the validation of quantitative methods;

建立转基因产品的零水平（0.1%）技术——通过欧盟指定的实验室进行定量确认转基因产品的最低水平。

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Sets a technical zero at a level of 0.1 % - the lowest level of GM material considered by the EU Reference Laboratory for the validation of quantitative methods;

建立转基因产品的零水平（0.1%）技术——通过欧盟指定的实验室进行定量确认转基因产品的最低水平。

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