The objectives of this study are to evaluate the GLAS data and to investigate the ability of MISR-like data for forest structural parameter estimation.
本文的研究目的是评估glas数据，分析类似于MISR的数据对森林结构参数的估计能力。
The objectives of this study are to isolate and purify the antibiotic produced by the biological agent, and use the crude antibiotic to make a biological formulation.
本文的主要目的是对该菌株产生的抗生素进行分离纯化，确定其结构，建立抗生素中试提取工艺及开发出合理的生物农药剂型。
The objectives of this study were to investigate the effect of insect and soil water contents on phenolic compounds and nitrogen concentrations in leaves of Populus euphratica.
研究了不同土壤水分条件下虫害胁迫对胡杨叶片中酚类物质含量及氮含量的影响。
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