课本上鸟笼是the birds' cage 到底是 the bird's cage还是 the birds' cage

课本上鸟笼是the birds' cage 到底是 the bird's cage还是 the birds' cage 鸟笼是the bird's cage还是the bird cage 鸟笼用英语怎么说,蛇笼又怎么说.是bird cage 还是a cage of cage? on the birds cage是什麽意思 on the birds' cage 什么意思 the bird 's cage中文意思 lion in the bird cage THE BIG BIRD CAGE怎么样 The sign on the birds cage is intereting一般疑问句 The sign on the birds' cage is interesting.怎么改 many birds sang happyily in a big bird cage in the we shold ____(be) quiet near the birds cage