???2??????2?????????????? ??????????,?2???1??,???????,??????????
??????????????,??,??????????????????????????????????????,?????????????
???,???,??????????????????????????25%?,???10%?
????????:??????
????????:????????????
??:??????????????????
??:???????????????
??!??????????????????
??????????????????????
?????????????10???????
MLB??????????:?????????
??:???????????21????
????????????????????????
??:???????????9???
????2??????????2???
????????????????????
??:???????????21????
???!?????????????????
???????????????????
??:???????????21????
?????:??????????????
???:???????????????
????????????????????
?????????????????30??
?????????5.5%??????1????
??:???????????????
???????????????????
??????????iOS
???????????:?15.60%??????