自然历史过程 process of natural history
自然程序假设 Natural Order Hypothesis
石油与天然气工程 Oil and Natural Gas Engineering ; Petroleum and Natural Gas Engineering ; Oil & Gas Engineering ; Oil and Gas Engineering
自然过程 natural process
自然方程 [数] natural equation
极大似然方程 maximum likelihood equations
天然过程 natural process
石油天然气工程 MSc Oil and Gas Engineering ; MSc in Oil & Gas Engineering ; Petroleum and Natural Gas Engineering
自然音程 Diatonic interval ; Natural interval
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