It was known that the rebuilt of station site and environment, the good management of devices are three major factors to get excellent observation results.
众所周知，台址与环境改造、仪器设备和良好的管理是获得优秀的观测成果不可缺少的三个重要因素。
Results: Although there were some differences among the three varieties, the same major constituents were founded in them.
结果：怀山药、淮南山药、铁杆山药三个品种有一定差异，但它们的主要成分相同。
According to the requirements of aircraft structure fatigue test, the paper gives some rules and methods through analyzing and studying three major factors which affect test results.
本文根据飞机结构疲劳试验的要求，分析并研究了影响试验结果的三个重要因素。
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