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二阶 èr jiēstresses
math. второго порядка; второй порядок
二 阶: 137 phrases in 21 subjects
Antennas and waveguides1
Aviation1
Chemistry1
Computers1
Construction1
Dentistry1
Economy1
Electronics6
General62
Information technology1
International Monetary Fund3
Mathematics13
Medical1
Military1
Mining1
Oceanography & oceanology1
Photography2
Politics1
Statistics1
Technology36
United Nations1