“old stone age”的概念、定义、翻译、参考文献-科学参考

单词	old stone age
释义	old stone age Encyclopedia 理学第四纪古生态释 palaeolithic; palaeolithic age; old stone age旧石器时代从人类能制造并使用工具开始到距今约1万年前。在地质时代上涵盖上新世晚期（距今约330万年前以后）和整个更新世。
随便看	commutative commutative A-algebra commutative algebra commutative-associative ring commutative Banach algebra commutative band commutative binary composition commutative center commutative cochain commutative composition commutative convergence commutative diagram commutative elements commutative extension commutative field commutative graded algebra commutative group commutative group object commutative groupoid commutative group scheme commutative half-algebra commutative hypergroup commutative identity commutative lattice commutative law

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。