????2???????13???????????? ???????(BBC)??,????????13???????????????,???,???
?,?????????????,???
????:???????
????????????????
????????2300???????????
???GPS??2????:????????
?????10?????????????
???????????80?????????
??????J?:?????????????
??:??????4????????????
VR??????VR???????????????
????????????????????
????????????????????
?????:???????????????
?????????????????????
??:??????4????????????
?????10?????????????
??????J?:?????????????
?????????????????????
???GPS??2????:????????
??????12???????????
?????:???????????????
?????10?????????????
?????????????????????
??:??????0.7???????5.84?
??:?????????????????30%
???????:??????????????
?????????????