单词	lifespan
释义	lifespan /ˈlʌɪfspan / noun The length of time for which a person or animal lives or a thing functions: the human lifespan... As humans lengthened lifespans with better nutrition and hunting skills, childhood also lengthened. They are slow-breeding and long-lived animals, achieving lifespans of 70 years or so. I suggested that extending human lifespans might lead to extended creativity.
随便看	basso profundo basso-relievo bass reflex Bass Strait bass viol basswood bassy bast bastard bastardise bastardization bastardize bastardry bastard-trench bastard wing bastardy baste baster Bastet bast fibre Bastia bastide Bastille Bastille Day bastinado

英语词典包含243303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。