???????????2??21?? ????????21???,????????????????20???????????????,???????????????????“???????????????????”????

?,????,??????????????-???????“????????????”???????????,?????????

??,????????20???????????????????,?????????????????????????????,??,????????????,???

??????????????:?????????????????????? “?????”_????

?? ??“??”???????????????

????:1??????:????????

2??????????app??

3????????

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

5???????

???????????2??21?? ????????21???,????????????????20???????????????,???????????????????“???????????????????”????

?,????,??????????????-???????“????????????”???????????,?????????

??,????????20???????????????????,?????????????????????????????,??,????????????,???

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