????:1?????:?????

2?????

3?????

4???????????

5??????????

??????????????6???????????????27? ??,???,??(ISO/TC 81)?????????????,?????????

?????????????,??????“???”???????????????????(FAO)???,?????????30%~40%???????????????????,??????????????????????????,??????????????????????????????

ISO/TC 81??????????,??????????????,??????????????????????

???????:???