“pure forest”的概念、定义、翻译、参考文献-科学参考

单词	pure forest
释义	pure forest Encyclopedia 农学纯林释 pure forest纯林由一种树种组成，或虽由多种树种组成，但主要树种的株数或断面积或蓄积量占总株数或总断面积或总蓄积量65%（不含）以上的森林。
随便看	positively definite form positively definite kernel positively definite matrix positively definite quadratic form positively graded module positively invariant subspace positively oriented base positively semi-definite positively stable point positively stable solution positive manifold positive map positive mapping positive mass conjecture positive matrix positive measure positive metric positive/negative helicity spinors positive number positive octant positive operator positive operator valued measure positive-operator valued measure POVM positive operator value measure positive operator value measure (POVM)

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。