单词 | Gregorian telescope |
释义 | Gregorian telescope n. a reflecting telescope in which light reflected from a secondary mirror passes through a hole in a primary mirror. Etymology: J. Gregory, Sc. mathematician d. 1675, who devised it |
随便看 |
英语词典包含43808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。