northeastern area of china 中国东北地区
A case study on the effect of different plot area on forest gap model simulation was conducted with forest gap model NEWCOP in broad leaved Korean pine forests at Changbai Mt. of Northeastern China.
以中国东北长白山阔叶红松林为例，应用林窗模型NEWCOP探索了不同模拟样地面积对林窗模型输出结果的影响。
To investigate concentrations of polycyclic aromatic hydrocarbons (PAH) in Ambient particulate matter and their mutagenic activities in an Industrial Area of Northeastern China.
调查东北某工业城市大气颗粒物质和多环芳香烃类化合物的浓度以及它们的致突变活性。
Soybean, as the major crop in northeastern China, is the main source of peasants' income. According to an investigation made in producing area, price change has a great impact on peasants' revenue.
大豆作为我国东北产区主要农作物，是农民收入的重要来源，根据对产区的调查，大豆纯收入一般占农户纯收入的五分之之，大豆价格的变化对农民的收入影响极大。
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