“perpetual calendar”的概念、定义、翻译、参考文献-科学参考

单词	perpetual calendar
释义	perpetual calendar [pǝr`pech·ǝ·wǝl `kal·ǝn·dǝr] ^ASTRONOMY A table or mechanical device used to determine the day of the week corresponding to any given date over a period of many years.
随便看	kinomere kinoplasm Kinorhyncha Kinosternidae kintal kinzigite kip Kirchhoff formula GMT gnat gnathic index Gnathiidea gnathion gnathite Gnathobdellae Gnathobelodontinae gnathocephalon gnathochilarium Gnathodontidae gnathopod gnathopodite gnathos gnathostegite Gnathostomata Gnathostomidae

科学参考收录了103327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。