本文主要论述“八五”机组的电气系统主要原理、设计操作、计算机取样控制和辅机控制。
This paper describes principal principle of electric systems, the design operation, the computer sampling control as well as auxiliary machine computer control for the "Eighth Five - Year Plan" sets.
分析和取样方法是对食品进行检验和控制的必要基础。
The methods used for analysis and sampling are the necessary basis for food inspection and control.
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。
Clinical trials take a long time because they're rigorously controlled, with close attention paid to sampling bias and methodology.
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