“polyfocal projection”的概念、定义、翻译、参考文献-科学参考

单词	polyfocal projection
释义	polyfocal projection Encyclopedia 工学地图投影释 polyfocal projection多焦点投影在一幅地图上根据不同要求，设有多个投影中心，使其比例尺自投影中心向四周辐射方向连续变化的投影。
随便看	umbra umbra and penumbra of the sunspot umbral umbral algebra umbral calculus umbral dot umbral eclipse umbral flash umbral index umbral notation umbral operator umbral shift umbrella umbrella anchor winch umbrella clause umbrella effect umbrella fern umbrella fern family umbrella ferns umbrella graph umbrella hydro-generator umbrella pine family umbrella sampling umbrella species Umbrians

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。