戴蒙德认为他们把摩艾石像放在木制雪橇上，然后拖过原木轨道，但这需要很多木材和人力。

Diamond thinks they laid the moai on wooden sledges, hauled over log rails, but that required both a lot of wood and a lot of people.

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原木顺流漂到木材加工厂。

The logs are drifted downstream to the mill.

《牛津词典》

但现有的识别木材来源和清除非法原木的技术正变的更加精细。

But the technologies available to identify the source of timber and thus weed out illegal logs are becoming ever more elaborate.

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