?? ?????????????????????????
![](https://image.chezhanri.com/2019/1218/83fe2d667ed1d8e17913f6a8b37e3fee.jpg)
????:1?????????:????????????
2???????????
3???????????
4???????????
5????100?????
??????????6??27?????????????????? ????????????????,??,??(ISO/TC 81)?????????,?????????????
????????,???????????????“?????????”???????????????(FAO)??,??????????????30%~40%????????????????????????????,???????,????????????????
ISO/TC 81???,?????????????,?????????????????
???????:?????????????????