When the voltage in the capacitor reached a certain level, it triggered the transistor; the transistor turned on, and the wipers wiped once.
当电容器电压达到一定程度，它便会激活晶体管；晶体管打开，雨刷运转一次。
3
If the difference between the positioning information is greater than the accepted level, a warning will be triggered to alert the train operators of an inconsistency.