单词	D region
释义	D region noun : the lowest part of the ionosphere occurring approximately between 30 and 55 miles (50 and 90 kilometers) above the surface of the earth Word History First Known Use 1930, in the meaning defined above
随便看	readorning readorns readout readouts reads reads into reads out reads over reads the riot act reads the riot act (to) reads the riot act to reads through reads up on readvance readvanced readvances readvancing readvent readvertised readvertises readvertising readvised readvises readvising ready

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。