A method of systematic sampling has been adopted for Ailuropoda melanoleuca in Foping Nature Reserve.

已对佛坪自然保护区的大熊猫采用系统采样的方法。

A method of systematic sampling has been adopted for Giant panda (Ailuropoda melanoleuca) in Foping Nature Reserve.

已对佛坪自然保护区的大熊猫采用系统采样的方法。

The efficiency of regression estimate was usually higher than systematic sampling.

通常情况下，回归估计的效率高于系统抽样。

The outpatients expenses in a teaching hospital in Shiyan were investigated by means of systematic sampling.

本文采用系统抽样的方法，调查了某医院门诊病人费用情况及有关因素。

A method of systematic sampling has been adopted for Giant panda ( Ailuropoda melanoleuca) in Foping Nature Reserve.

采用系统抽样方法对佛坪自然保护区大熊猫的夏季栖居地进行了研究。