“减焦距镜”的概念、定义、翻译、参考文献-科学参考

单词	减焦距镜
释义	减焦距镜 Encyclopedia 艺术学特殊效果镜释 wide converter减焦距镜安装在摄影镜头光路中，可使该摄影镜头的焦距值成倍率（如0.42×、0.7×）缩小的附属镜。为倍率镜的一种。又称减倍镜、广角附加镜。
随便看	family of points family of polynomials family of population distributions Family of Revolutionaries family of sets family of several parameters family of solutions family of straight lines family of supports family of surfaces family of Thimig Family Opera Troupe Family Opera Troupe of Ming and Qing Dynasty family-orientation family parameter Family Periodical Group Ltd family planning family planning clamp family planning operation instruments family-planning policies of rural population family planning statistics Family Policy family politics Family Portfolio Entrepreneurship family process variable

科学参考收录了854744条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。