“简单机械”的概念、定义、翻译、参考文献-科学参考

单词	简单机械
释义	简单机械 Encyclopedia 理学静力学释 simple machinery简单机械人类在劳动实践中最早创造的结构简单的机械，包括杠杆、滑轮、斜面、螺旋、尖劈等。
随便看	externally prestressed concrete structure externally-pulsed externally stable set externally tangent external-magnetic wet permanent drum magnetic separator external mold external motivation of learning external negation external network external occipital crest external occipital protuberance external occultor external occultor coronagraph external oriented economy external parameter external part-time of administrative subject external part-time of market subject external path length external photoelectric effect imaging device external plasticization external point external point of view external pollutant loading control external potential external pressure confinement

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。