Tall larch of western North America have pale green sharply pointed leaves and oblong cones; an important timber tree.

北美西部高大的落叶松属植物，浅绿色尖角树叶，椭圆形球果；重要的木材。

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As a basic measure for forest management, pruning has an important role on improving tree trunk shape and timber quality.

修枝作为森林经营中的一项基础性措施，对提高林木材质、改善林木干形等都具有重要意义。

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As we all know, the slow maturation of bamboo only 4-6 years, a tree is at least 20 years to become useful, therefore, in many areas, bamboo has become an important alternative to timber resources.

众所周知，竹子的成材期只需4 - 6年，而一棵树的成材至少是20年以上，因此，在很多领域，竹子已成为替代木材的重要资源。

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