求翻译：在校园内的手机RFID-SIM一卡通系统中，用户可以用手机在食堂内消费、在小卖部购物、可以用来进出大门、刷手机考勤、用手机进出停车场等等，还可以通过手机RFID-SIM卡的“空中补助”功能，实时将补助金额充入RFID-SIM的电子消费钱包中，实现“随充随用”功能。可以说凡是原来一卡通系统中需要用证件、卡片的地方，现在都可以用手机扩展功能来实现。真正实现了“一卡（机）在手，走遍校园”。是什么意思？

Phone RFID-SIM on campus one-card system, users can use the phone in the canteen in consumption, shopping at the commissary, can be used in and out of the gate, brush mobile attendance and use the phone and out of the car parks and so on, or by phone RFID-SIM card "air assistance" feature, filled with RFID-SIM of the subsidy amount in real time in consumer wallets, realization of "filled with" function. Can say who originally need documents, cards in the card system, can now use the phone extension feature to implement. Truly "one card (machine) in hand, around the campus."