她根据作者、年龄和插图画家分别为该书编了索引。She's indexed the book by author, by age, and by illustrator.这个存量巨大的档案室的所有文件都已编了索引，可供研究人员使用。This vast archive has been indexed and made accessible to researchers.在索引中查找。Look it up in the index...
North American dark bluish - gray gallinule.北美深蓝灰色的水鸡.The pumpkin is the only esculent of the orange family that will thrive in the North.南瓜是柑橘科中唯一能在北方种植的蔬菜.They sailed across the Baltic and North Seas with only a compas...