noun 下载 🔗分享 平胸鸟, 走禽 A bird of the order of Struthioniformes, a diverse group of large running, flightless birds, mostly extinct, but including the cassowary, elephant bird, emu, kiwi, moa, ostrich, rhea and tinamou Examples : "At the zoo, we saw the ostrich and the emu, learning that these large, flightless birds are both types of ratites. " 在动物园里，我们看到了鸵鸟和鸸鹋，了解到这些大型不会飞的鸟都属于平胸鸟。 bird animal biology nature 与AI对话词汇游戏阅读练习
