There are two important points regarding sampling: a regular volume is sampled since repeated sampling is required;
关于采样有两个重要的点：定期体积被采样，因为需要重复采样；
Methods Evaluations of cost-benefit for one group repeated sampling data and pairing design of repeated sampling have been explored.
方法探讨单组重复采样设计及配对重复采样设计的成本效益评价。
In repeated sampling of a time varying population, the use of previous survey results can improve the present survey results or save the survey costs.
对一个时变总体进行经常性调查时，利用前次查的结果，可以提高本次调查结果的精度，节省调查的费用。
The repeated sampling showed that the aluminum concentration in the same city varies with time. In general, the more the coagulant dosage, the high residual concentration of aluminum is.
重复取样表明，在同一城市饮用水中铝的浓度随时间而变化，一般是混凝剂投加量越高残留铝浓度越高。
Each of the four "sampling" areas takes one dry season to complete and then the cycle is repeated, so that each area is sampled once every four years.
在这四个“采样”区内的每一个地区进行的调查都要花一个旱季的时间，之后再重新开始这个循环，以便每四年完成一个区的调查工作。
The main panel displays two channel sampling signal, the repeated projectile velocity and the firing rate.
主界面显示两通道弹丸过靶波形、弹丸速度及连发弹射频。
The main panel displays two channel sampling signal, the repeated projectile velocity and the firing rate.
主界面显示两通道弹丸过靶波形、弹丸速度及连发弹射频。
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