The Power Factor of electronic devices is a main index to judging their performance, while Active Power Factor Correction (APFC) is a radical and effective approach to improve Power Factor.
用电设备的功率因数是衡量其性能的一项重要指标，而提高功率因数的最根本和有效的途径就是采用有源功率因数校正技术。
The free radical concentration (Ng) of kerogen is a valid index to study thermal maturation of organic matter and paleotemperature of sedimentary basin.
干酪根自由基浓度是研究有机质热演化的有效指标之一。也是研究沉积盆地古地温的热参数之一。
The ratio of MDA/SOD reflected the ability of idation and anti- idation It was also an important index to reflect metabolism of free radical in body.
SOD比值反映了组织中氧化和抗氧化的能力，也是反映机体自由基代谢平衡的重要指标。
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