Bill Gates: 今年早些时候，我首次前往巴基斯坦，了解该国为消灭脊髓灰质炎所做的令人难以置信的努力：gatesnot.es/3mf9OXo

原推：Earlier this year, I made my first trip ever to Pakistan to learn more about the country’s incredible efforts to wipe out polio: gatesnot.es/3mf9OXo

https://twitter.com/BillGates/status/1532818144762335233