“择伐周期”的概念、定义、翻译、参考文献-科学参考

单词	择伐周期
释义	择伐周期 Encyclopedia 农学森林经营方案释 cutting cycle择伐周期在异龄林经营中，采伐部分达到成熟的林木，保留其余林木继续生长，当林分结构恢复至伐前状态时，所用的时间称为择伐周期。即同一林地进行2次相邻择伐的间隔期。又称回归年。
随便看	positive rotation positive school of criminology positive selection positive self-adjoint operator positive self-regard positive semi-definite positive semi-definite form positive semi definite Hermitian matrix positive semi-definite Hermitian matrix positive semi-definite kernel positive semi definite matrix positive semi-definite matrix positive semi-definite operator positive semi definite quadratic form positive semi-definite quadratic form positive semi-definite rational function positive semigroup positive semiorbit positive semi-trough positive sense positive sense single-stranded RNA virus positive sequence positive series positive side positive sidelight

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。