单词 | Ratitae |
释义 | Ratitaeplural noun Ra·ti·tae rəˈtītˌē in some classifications : a superordinal group of birds comprising forms with small or rudimentary wings, no pygostyle, and no keel to the breastbone that are nonetheless evidently descended from birds with the power of flight, including the ostriches, rheas, cassowaries and emus, elephant birds, moas, and kiwis, and usually constituting a primary subdivision of the subclass Neornithes |
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英语词典包含469781条英英释义在线翻译词条,基本涵盖了全部常用单词的英英翻译及用法,是英语学习的有利工具。