?? ?????????????????
????:1???????:????????
2????????????
3???????
4??????app
5??????
??1?29??????? (??? ???????)???????????????1???????29?????,????????????????????????????,???????????????
?,???,??,????
??????????????????????,??60?????4???????????????????????????????????????????????,??????3?????
?,??????21??????????????????????????,????
?23????,???
??2009??????????,??????DHC-8???????????,???????????????????45???????????2?????2??????????????????,?1????????(?????????????????) ?????????:??????????????