单词	Ultrabook
释义	UltrabookUl‧tra‧book /ˈʌltrəbʊk/ noun [countable] trademark a very thin fast light laptop computer
随便看	penguin penicillin penile peninsula peninsular Peninsular War penis penitence penitent penitential penitentiary penitently penknife penlight penmanship pen name pennant Penney, J C pennies penniless Pennines Pennine Way pennon penn'orth Penn, Sean

英语词典包含52748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。