单词	unpenetrable
释义	unpenetrable adjective un·​penetrable "+ : impenetrable Word History First Known Use 15th century, in the meaning defined above
随便看	bust out bust out something bust peg bust someone's chops bust something out bust up bust-out man Bustamante y Sirvén bustamente furnace bustamite bustard bustard quail bustards busted busted out busted up bustee bustees buster Buster Brown busters bustest busthead busti bustian

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。