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单词	insomnia
释义	in·som·ni·a (ĭn-sŏmnē-ə) n. Chronic inability to fall asleep or remain asleep for an adequate length of time. [Latin īnsomnia, from īnsomnis, sleepless : in-, not; see IN-1 + somnus, sleep; see swep- in the Appendix of Indo-European roots.]
随便看	role-playing role-playing game Rolfe Rolfing roll Rolland rollaway roll back rollback roll bar roll call roller roller roller bearing Rollerblade roller coaster rollercoaster roller hockey roller skate roller-skate roller skater attune Atty. Atty. Gen. ATV

英语词典包含135693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。