infrared transmitting crystal

例句：

1. 1.The infrared transmitting crystal is used to transmit signals over long distances.
   红外传输晶体用于远距离信号传输。
2. 2. This infrared transmitting crystal can detect the presence of a person from a distance.
   这种红外传输晶体可以从远处探测到人的存在。
3. 3.The infrared transmitting crystal is a crucial component in many security systems.
   红外传输晶体是许多安全系统中的关键组件。