单词	focal length
释义	focal lengthˈfocal length noun [countable] technical Examples EXAMPLES FROM THE CORPUS A single focal length, fixed-focus is often sufficient. Properties of a parabola All parabolas are similar. Focal length a determines the magnitude. The image produced by a diverging lens is however frequently virtual and consequently the focal length does not seem easy to determine. the distance between the centre of a lens and the focal point
随便看	enema enemy energetic energetically energize energizing energy energy-efficient enervate enervated enervating enfant terrible enfeeble enfeebled enfold enforce enforceable enforced enforcement enforcer enfranchise trampoline trampolining trance tranche

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。