“??”50??????????????

????:???????????:????VX

??,??,???????3???????????????????????,??“??????????”50???“???”?

???????????????,??????????????????3700?????,????2300????????????????????????????????????,?????????????1800?,???????1978?????????????????????,??????????????????1965????????????????,?????????“?????????”50????????2019???????????????????????????(IUCN)??,????(CR)????????????

???????,????????????,?????????????????????????3??????????????????????????????????,3???????“???????????????”50???

????,????????????,??,?????????50???????????,????????????50???????????????????????????????,???50??,????,?????,??????????????????????,????????????,????????????,??????? (?? ??????? ?? ? ???)

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