?? ????????????????:2023????????
????:1???????:??24?????
2????????
3?????
4???100??????
5????????
12??5???,??????????12?????????????«????»?????????,?????????,2023????????????????????????421.4±0.1ppm,????????????????????????,???????????????2022?????????????????????????2.3ppm,?,????????????????????(2.4ppm),????????,??????10??????(2014-2023?????????)?????????????????(2.4ppm)??1986±0.6ppb?337.3±0.1ppb,????2022???????????8ppb?0.8ppb,?????2023?2022??(????????)
?:????