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During the study, researchers recorded the width of the tree rings of balsam firs.

通过这个研究,研究者记录下香脂冷杉的年轮的宽度

During the study, researchers recorded the width of the tree rings of balsam firs. Each ring marked a year of the tree's growth. A narrow ring indicated that the tree's growth had been suppressed that year.

在此研究中,研究者们记录了胶冷杉的年轮和宽度,一圈年轮代表胶冷杉成长了一年,某一圈较为细密的年轮代表在这一年内胶冷杉的成长受到了压制。

Identification bracelets commonly fall into the Bangle category because of their width.

鉴定手镯一般属于,因为它们的宽度手镯类。

Juveniles with black teardrop-shaped marking on cheek; barbel always longer than eye width.

黑泪珠形脸上标记的青少年;须总是长於眼宽度

Although each of the 11 species of the bark beetle had its own spatial niche and overlogs niche, they could attain competitive equilibrium and coexistance according to their requirment for different nutrition and space, the interference of population density and the different time interval attacking the host tree.

虽然,这11种小蠹虫具有各自不同的生态位宽度,且存在不同程度的生态位重叠,但各小蠹虫可依据其对寄主树木营养和空间需求的不同、种群密度的相互制约,以及入侵寄主树木时序的差异达到竞争的平衡和共存。

The simulation revealed the influence of the bas-relief and elbows on the flow flied and phase distribution, and the impact of the bas-relief height, width, intervals and slope angle on the flow flied.

通过模拟计算考察了浮雕结构和弯曲对流动及相分布的影响,以及浮雕结构的高度、宽度、间距和倾斜角度对流动的影响。

Tree ring width and basic density of trees selected from healthy and acid rain damaged forests were analysed to evaluate the possible impacts on tree growth and wood properties.

通过对受害材与健康材的年轮宽度和基本密度的对比研究,可以看出酸雨对杨树生长产生了显著的影响。

Acid rain ; air pollution ; populus ; tree ring width ; basic density.

酸雨;大气污染;杨树;年轮宽度;基本密度

The paper compares and analyses growth ring width and basic density of Pinus tabulaeformis which grow in Badu forest farm of Longxian county in Shaanxi Province .

比较分析了陕西省陇县八渡林场油松木材的生长轮宽度、基本密度。

Pinus tabulaeformis ; half sib progeny ; parent ; growth ring width ; basic density.

油松;半同胞子代;亲本;生长轮宽度;基本密度

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