????:1???app????????:????

2?????????????

3???????

4???????????

5???????

2???????6?????????????,???

???,?????????????????????????????????,“??”???????????,??????????????????,?????????????????????????50????“??????????????50?????”,??????????,?????????

????????????????????????????????:“??!??????,????50??????,?,????????”

????????????????

???? ?? ????????

??????? ???????????????????? ??????????????? ??? ???

???

????? ?????:?????