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。

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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。

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METHODS The systematic sampling methods were used. 4 107 residents were investigated by questionnaires and some blood indexes were examined.

方法采用系统抽样方法，对社区4 107位居民实施问卷调查和相关指标的检测。

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Systematic water sampling in the late 19th Century was prompted by concern over cholera outbreaks and the generally appalling state of the Thames.

BBC: Thames archive reveals long nitrate rise