And on the other hand, the complexity extremely displays that the information got from actual plant decreased relatively, which made model and control of the plant become more difficult.
另一方面更突出地表现在实际中从对象所获得的信息量也相对地减少，这使得受控对象的建模和控制就更为困难。
Often a hand held integrating sound level meter such as the Model 30 would be mounted on a tripod at a boundary position and, for example, a 15 minute measurement made.
通常，一个手持集成示范等30人是在边界上的三脚架安装位置和声级计，例如，一个15分钟的测量制成。
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