The water made it easy to move timber to mills and overseas, but as loggers were forced farther inland, they needed to develop new methods of transporting their product.

有了水，将木材运往加工厂和海外市场就更加轻松，但随着伐木工人被迫深入内地，他们需要开发新的运输方法。

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Study of a very efficient and fast surface roughness of the wood-line detection system for the improvement of timber processing efficiency and product quality are of great significance.

研究一套高效、快速的木材表面粗糙度在线检测系统，对提高木材加工的生产效率和产品质量都具有重要的意义。

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The main source of the organic matter is coal, petroleum, timber and agricultural product.

有机物质的主要来源是煤、石油、木材和农产品。

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