systematic sampling

常见例句

双语例句

• 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 current nutrient status of crops can now be determined through the systematic sampling of plants as appropriate times.
  作物当时的营养状况，可在适当时期对植物的系统采样进行营养分析。
• 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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