... controlled observation 控制观察 controlled sampling 控制抽样 controlled search 控制性探索 ...
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... controlled process : 控制过程，受控过程 controlled sampling : 有控制的抽样 controlled state : 控制状态，受控状态 ...
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controlled or purposive sampling 受控制或有目的的抽样
Clinical trials take a long time because they're rigorously controlled, with close attention paid to sampling bias and methodology.
临床试验需要花费很长时间，因为它们处于严格控制之下，必须密切留意取样偏差与方法。
Sampling rate conversion methods of integral ratio, fractional ratio, and NCO controlled positive real ratio are investigated.
文中分析了整数倍、分数倍和NCO控制的正实数倍的采样率变换方法。
The sampling density can be controlled according to the practical requirement during the course of contour line vector.
在等高线的矢量化过程中，可根据实际需要对采样密度进行控制。
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