natural of sampling的意思|示意

When sampling frequency is quite high, frequency spectrum distributing of digital natural sampling and natural sampling is similarity.

当采样频率比较高时，数字化自然采样法的频谱分布与自然采样法的频谱分布类似。

PFU can be used as a sampling method for detection of organic chloride pollutants in natural water body and concentration variety of organic chloride pollutants in continuous water body.

有机氯污染物检测结果与PFU微型生物参数变化趋势相吻合。 PFU法可用于天然水体中有机氯污染物的筛选，以及连续水体中有机氯污染物浓度变化的监测。

"It's kind of obvious in retrospect," Xu said, "but sticky spider webs may be a 'natural' DNA sampling device for DNA from the spider, and from what it's been eating."

徐说，“现在回想起来好像也很显而易见，粘粘的蜘蛛网是收集蜘蛛及其食物dna的“自然”采样设备。”

Methods: Sampling was carried out in natural about water source of the Yellow River and running water in HuiNong area.

方法：对惠农地区黄河水和自来水进行采样分析。