flightless birds having flat breastbones lacking a keel for attachment of flight muscles: ostriches; cassowaries; emus; moas; rheas; kiwis; elephant birds
造句
【反義詞】
carinate
有龍骨形的
常用短語
Ratu
rat
rat leprosy
Ratzenhofer
Ratsarazafy
rat chamber
Rathbunella
rating life
Rattelsdorf
ratomorphic
rating tube
rat-arsed