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

2?????sn

3?????????vx

4?????????

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

?????????2???????21?????????????? (?????????)?“???????????????”????????????????????20????

??2018???????2022??????11????????????????????,????????????????,???????????“????????????????”??????????

?????????2023???10??????,??????6?,???????????3???????“???????????”?

??????????????????????????……????????????????,?????????

???1?,???????????5400???????????,????????????????????????????3300????????????????????,?????????

?????????????,??????????

?????“????”,????,??????,?????????,???????

?,????????????????????????????????????????,???,?????????,??????????????“??????????,????”(?) ??:?????