“great year”的概念、定义、翻译、参考文献-科学参考

单词	great year
释义	great year [¦grāt `yir] ^ASTRONOMY The period of one complete cycle of the equinoxes around the ecliptic, about 25,800 years. Also known as platonic year.
随便看	backs backsaw backsawing backscatter gage backscattering backscattering thickness gage backscatter radar backset back-set bed backshore backshore beach backshore terrace back shot backsight backsight method back siphonage back slope back solution backspace backspring backstay backstep sequence back stoping backswamp backswamp depression

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。