经实测资料验证，笔者提出的模型在拟合光皮桦种群自然稀疏过程中，均具有较高的可信度。
According to the verified data, the model presented in this paper characterizes its higher credibility in the process of natural thinning of Betla Luminifera population.
对在无自然稀疏和有自然稀疏状况下有关植物群落的竞争密度效应的两个倒数方程的差异进行了理论分析。
The differences between the two reciprocal equations of the competition-density effect in nonself-thinning populations and self-thinning populations were analyzed theoretically.
叶腐病由腐霉属真菌的菌丝体危害所致，主要损害多年生黑麦草的叶片，影响植株分蘖，造成草坪自然稀疏。
Leaf mould was attacked by Fusarium nival, and had effect on perennial ryegrass's leaves and tillers, leading turf to become sparse.
有利于形成这场汹涌洪水的自然因素有三条，这幅大汤普森峡谷下游的自然色图像展示出其中两者：陡峭的地形和稀疏的植被。
This natural-color image of the lower reaches of Big Thompson Canyon illustrates two of the three natural factors that contributed to the flood's severity: steep terrain and sparse vegetation.
假发是经历头发稀疏或头发脱落的男士的一种选择，它可以是人造的或自然的头发做的，而且通常被粘在头皮上。
An option for men who experience hair thinning or hair loss, hairpieces can be made from either synthetic or natural hair, and are usually glued to the scalp.
黄土高原半干旱的气候条件、稀疏的植被和疏松易蚀的黄土物质，是该地区高含沙水流形成的自然地理因素。
Semi arid climate, poor vegetation cover and highly erodible loess can be regarded as the main natural factors responsible for the formation of hyperconcentrated flows in the Loess Plateau, China.
黄土高原半干旱的气候条件、稀疏的植被和疏松易蚀的黄土物质，是该地区高含沙水流形成的自然地理因素。
Semi arid climate, poor vegetation cover and highly erodible loess can be regarded as the main natural factors responsible for the formation of hyperconcentrated flows in the Loess Plateau, China.
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