纯林

摘要以15块人工落叶松纯林演化后形成的落叶松云冷杉混交林为对象，间伐后12年观测结果，研究间伐对林分和树木生长、树种组成、物种多样性及土壤等因子的影响。

Pure Bright Festival; Tomb Sweeping Day; Qingming Festival

Gold can't be pure and man can't be perfect.

pure

pure imaginary【数】;pure imaginary number【数】;purely imaginary number【数】

radiochemically pure

clear and pure

chemically pure

catalogue memory (pure associative memory)