Sent_en: 2zh Officials have blocked off an area of Dresden approximately 1.9 miles (3km) from the site where the swan was found and have posted observation areas at approximately 6.2 miles (10km) outside the area as a precaution.
Sent_yy: 官员们封锁了距离发现天鹅地点大约1.9英里（3公里）的德累斯顿地区，并在该区域外大约6.2英里（10公里）处张贴了观察区域作为预防措施。