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

2??????????

3???????????

4??????????

5????????????

???????7??????????????????????19???????????????????????? (?????????????? ???)???????????????19??,??,?????????40????????????

?????????7???19???????,???????51????????????,??????????????????????,?????2.2??????,?????????

???(Alf Barrios)?????????????,??????,?????

???,40??,?4.5?,?????????????????????2.3??(???????????????????)?

??1987????????,?????????????????,????????????????????????????????????????????????????????

????????,??????????????2025??????????????,??2500???????????????

???(Simon Trott)??,??,??????????????,???????“??????????????????,??”(?????) ?????????????:?????????????????????