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单词	Gregorian telescope
释义	Gregorian telescope noun : a reflecting telescope that has a paraboloidal primary mirror with a perforation through which light is reflected to the eyepiece and an ellipsoidal secondary mirror set beyond the focus and that produces an erect image but a small field of view Word History Etymology James Gregory †1675 Scottish mathematician and inventor + English -an
随便看	Four Noble Truths four of a kind four paws four questions four-bagger four-ball four-by-four four-centered arch four-channel four-color four-cornered four-coupled locomotive four-cycle four-decker four-dimensional four-door four-em space four-eyed four-eyed fish four-eyed opossum Malpighian corpuscle Malpighian layer Malpighian tubule Malpighian tuft malpighias

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。