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universal constant
hydroel.st. 通用常数
metrol. 基本物理常量; 普适常量; 普适常数〔恒量〕
polym. 普适常数
universal constant: 18 phrases in 9 subjects
Agriculture1
Automobiles2
Aviation2
Engineering geology1
General1
Metallurgy1
Space1
Technology8
Wind Energy1