“dimension lumber”的概念、定义、翻译、参考文献-科学参考

单词	dimension lumber
释义	dimension lumber Encyclopedia 农学﹝产品﹞释 dimension lumber规格材截面厚度小于等于90毫米的，厚度和宽度按照规定尺寸加工的、规格化矩形截面锯材。
随便看	positive cycle positive definite positive definite bi linear form positive definite bi-linear form positive definite closed form positive definite form positive definite function positive definite functional positive definite Hermitian matrix positive definite inner product axiom positive definite kernel positive definite matrix positive definiteness positive definite operator positive definite potential positive definite product positive definite quadratic form positive definite scalar product positive definite sequence positive definite solution positive definite space positive definite tensor positive definte rational fanction positive deviation positive diffeomorphism

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。