For mature timber stands, the approaches of selection cutting, clear cutting and shelterwood cutting.

成熟的用材林应当根据不同情况，分别采取择伐、皆伐和渐伐方式。

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A timber house also means cutting down mature trees, painstakingly treating timbers to avoid warping and shrinkage.

建造木材的房子则意味着要砍伐许多已经成材的大树，对其进行精心处理以防变形和收缩。

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Some take two or three hundred years to fully mature - and no timber licence lasts that long - so the diversity of the forest is being eroded.

BBC: Roger Harrabin reports from Cameroon