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Natural stand could exert a larger marked effect (R/S value) than that of the plantation forest. 格氏栲人工林的根际效应(R/S值)比天然林的明显。
Fifteen Chamaecyparis genotypes including one from natural stand were under investigation.RAPD analysis from 8 primers revealed a total of 109 bands, of which 74 were polymorphic (67.5% polymorphism). 在15个红桧外表形态变异种，筛选到8个RAPD引子，共扩增出109个条带，其中74个条带为多型性（佔总条带数的67.;5%25）；
Seed crops are collected from both natural stands and plantations which may have been culled to form seed stands. 种子采自天然林和人工林，两者都可能是经过去劣留优作为母树林的。
Main wood features of plantations were similar to that of 60-100 year natural stands, so plantations are equally excellent pulpwood material. 人工中幼林与天然林主要材性指标差异不明显，均是优良纸浆原料。
Effect of harvesting techniques on culm yield of Gigantochloa scortechinii natural stands Othman A.R. Hashim M. kassim A.R. 第十一届中国国际地面材料及铺装技术展览会----全球地材亚洲平台
A Study of Genetic Gain of Pinus yunnanensis Natural Stand 云南松天然林分遗传增益研究
It is natural for a cat to catch mice. 猫捉老鼠是本能。
In the fine natural stands of fine provenance, 80 candidate trees were obtained through 1-4 comparison, with the average tree height 23.9m, the average DBH 72.66cm, the average volume 3.93m3, the average red-heart ratio 71.01%. 在福建省马尾松优良种源区内，用对比木法进行红心材优树选择。共选出80株候选优树，平均树高23.;98m、平均带皮胸径72
It's natural to slack2 off towards the end of a hard day's work. 一天紧张工作快结束的时候有些放松是自然的。
Many natural materials are becoming scarce. 许多天然原料越来越少。
Our motherland flows with natural resources. 我们祖国蕴藏着丰富的天然资源。
Events took their natural course. 事态依自然进程发展。
She has a natural wave in her hair. 她的头发自然卷曲。
Magnetism is a natural phenomenon. 磁力是一种自然现象。
It is difficult to be natural when one is tense. 人在紧张的时候很难泰然自若。
Please don't stand on ceremony (ie Please be natural and relaxed) with me. 请勿拘礼。
The egoism of an artist sometimes seem natural. 艺术家的自负有时看起来是自然的。
They used only natural pigments to dye the wool. 他们只用天然颜料染毛织品。
Children are natural exhibitionists. 儿童天生喜欢自我表现。
Everything we used was made from natural materials. 我们所用的一切都是由天然材料做成的。