They placed a metal band with an identification number on the bird's leg.他们把有识别码的金属圈固定在鸟的腿上。The surgeon placed a metal band around the kneecap to help it knit back together.外科医生在膝盖骨上套了个金属箍促进愈合。Surgeons placed a metal band around the knee cap to help it knit back together.外科医生在膝盖骨上套了个金属箍以帮助其愈合。