Researches into vocabulary knowledge measurement develop along three main lines, i. e. the passive vocabulary size, the depth of vocabulary knowledge and free active vocabulary.
词汇知识测量的研究有三条主线，即消极词汇量，词汇知识深度和积极词汇知识。
The main graduation lines shall extend at least three quarters of the way around the graduate and shall be numbered.
应使量杯的主刻度线在量杯线路上至少延伸四分之三并对其编号。
The incremental method, differential equation method and integral equation method are three main methods in zero-sequence parameters on-line measurement of transmission lines with mutual inductance.
输电线路的零序参数尤其是多回互感线路的零序参数是电力系统继电保护整定计算需要的重要参数，所以其准确测量具有重要意义。
The incremental method, differential equation method and integral equation method are three main methods in zero-sequence parameters on-line measurement of transmission lines with mutual inductance.
输电线路的零序参数尤其是多回互感线路的零序参数是电力系统继电保护整定计算需要的重要参数，所以其准确测量具有重要意义。
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