“astronomical clocktower”的概念、定义、翻译、参考文献-科学参考

单词	astronomical clocktower
释义	astronomical clocktower Encyclopedia 历史学科学技术释 astronomical clocktower假天仪中国北宋苏颂受到浑仪小样的启发，提出制作思路，韩公廉推算设计，历时数年做成的天体演示仪器，即后来所谓天象仪的先祖。
随便看	commutative valuation commutativity commutativity condition commutativity relation commutator commutator algebra commutator calculus commutator closed group commutator factor group commutator group commutator ideal commutator identity commutatorless motor commutator operation commutator product commutator quotient group commutator series commutator subgroup commute commuter’s bus and subway discounts commuting commuting elements commuting endomorphisms commuting extensions commuting mappings

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。