单词	sporadic E layer
释义	sporadic E layer noun : a layer of ionization occurring irregularly within the E region of the ionosphere Word History First Known Use 1949, in the meaning defined above
随便看	staff corps staff notation staff nurse staff of aesculapius staff of as staff of Asclepius staff of life staff officer staff ride staff rush staff sergeant staff sergeant major staff system staff tree staff vine staff walk staff-herd staff-tree family Staffa staffage staffed staffer staffers staffest staffette

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。