鸵
5.flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds.
6.a ratite bird order: birds intermediate in characteristics between ostriches and emus: recent and extinct rheas.
7.Any of several flightless birds of the genus Apteryx native to New Zealand, having vestigial wings and a long, slender bill.
8.The skeletons of sacro-pelvic region are compared among four species of ratite: Cassowary(Casuarius casuarius),Emu(Dromaius novaehollandiae),Rhea(Rhea americana) and Ostrich(Struthio camelus).
9.The risk analysis ranges include alpaca. , llama, guanaco, and vacuna.
10.There are two hundreds-years-old lounge bridges and a large number of outstanding vernacular architectures in Sixi town, Taishun county of Zhenjiang province.

