In Maine Daniel Jennings of the u. s. forest service has enlisted spiders in the war against the spruce budworm the northeast's most devastating enemy of spruce and fir forests.
在缅因州，美国林业局的丹尼尔·詹宁斯征募蜘蛛来与云杉芽卷蛾——东北部云杉和冷杉林最凶恶的敌人——作战。
Using typical sampling method, the paper studies the composition and important value of plant species in subalpine spruce fir forest on Northern Slope of Changbai Mts.
采用典型抽样方法，对长白山北坡不同海拔高度带云冷杉林的植物种类组成及重要值进行了初步研究。
The natural spruce-fir mixed stand is one of the main forest types in China, and also has large proportion in the civil and national consuming.
天然云冷杉针阔混交林是我国的主要森林类型之一，在国民用材中占有相当大的比重。
The natural spruce-fir mixed stand is one of the main forest types in China, and also has large proportion in the civil and national consuming.
天然云冷杉针阔混交林是我国的主要森林类型之一，在国民用材中占有相当大的比重。
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