研究人员起初用测试和误差来定位传感器节点。
The researchers initially used trial and error to place the sensor nodes.
定位传感器的引入，使系统的软件工作简化。
The introduction of the positioning sensor makes our software easier.
它们可以包括环境传感器、定位传感器、光纤传感器和声传感器等。
They can include environmental sensors, location sensors, optical sensors, acoustic sensors and many others.
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