“grassland agriculture”的概念、定义、翻译、参考文献-科学参考

单词	grassland agriculture
释义	grassland agriculture Encyclopedia 农学草地农业释 grassland agriculture草地农业以草地资源为基础，从事资源保护利用、植物生产和动物生产及产品加工经营，以获取生态、经济和社会效益的基础性产业。
随便看	negative real number negative recurrent state negative refraction negative refraction index materials negative-refraction-index materials negative refractive index negative regression negative reinforcement negative relation negative resistance negative resistance amplifier negative-resistance device negative-resistance oscillator negative response negative result negative root negative rotation negative selection negative semi-definite negative semi-definite form negative semi-definite kernel negative semi definite matrix negative semi-definite matrix negative semi-definite operator negative semi definite quadratic form

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。