primary detector

例句：

1. 1. The primary detector in the lab detects the presence of radiation.
   实验室中的主探测器检测到辐射的存在。
2. 2.The primary detector is responsible for identifying the type of material being analyzed.
   主探测器负责识别正在分析的材料类型。
3. 3. The primary detector was designed to be highly sensitive and accurate.
   主探测器被设计为高度敏感和准确的。