设计了一种由单片机控制的无线发射与接收的非接触式的火车接近报警系统。

Designed a wireless non-contacting alarm system of closing train, and its Launching and receiving is controlled by MCU.

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以语音方式发出列车接近报警信息，通知桥梁或隧道中的工作人员注意和避让，保护人员和设备的安全。

Via speech sound, it was alarmed train approaching, noticed the men working in brige or tunnel to be careful and keep away fron track, protected the safety of men and device.

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低电量焦虑指手机电量接近20%报警值时，人们会变得恐慌和焦躁的状况。

Low battery anxiety describes the condition where people get panicked and annoyed when your phone's battery is dangerously close to the 20 percent mark.

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