This paper introduces the natural ecology condition of original place, breed formation, appearence, character, adaptability and production performance of Zhongdian yak.
全面介绍了中甸牦牛的产地自然生态环境、品种形成、外貌特征、适应性和生产性能。
These provided scientific basic data for analyzing degree of photosynthetic rate responding the environmental factors, analyzing optimum condition of physiological ecology and improving productivity.
这为分析沙棘光合作用对环境因子的响应程度，分析沙棘最适生理生态条件，提高沙棘生产力提供科学依据。
Tidal current is the essential dynamic condition in the coastal zone and estuary and the basic active factor also to study the water environment and ecology problem.
潮流和风生流都是浅海水流运动的基本形式，也是研究海岸河口水动力和环境问题的基本动力因素。
Tidal current is the essential dynamic condition in the coastal zone and estuary and the basic active factor also to study the water environment and ecology problem.
潮流和风生流都是浅海水流运动的基本形式，也是研究海岸河口水动力和环境问题的基本动力因素。
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