到了1970年代,这些都是造成广泛破坏植被。
By the 1970s, these were causing extensive damage to vegetation.
在印度尼西亚这是一个明显的问题,海啸对该国亚齐省造成广泛的破坏,重建工作对木材的需求量非常大。
This is particularly a problem in Indonesia, where the tsunami damage in Aceh province is extensive, and the wood requirements for reconstruction are very large.
研究人员说,可是,如果这个物体稍微大一点——直径二十至三十米(60至90英尺)——它可能会轻易地造成广泛的破坏、生命的丧失。
However, if the object had been slightly larger - 20 to 30 metres (60 to 90ft) across - it could easily have caused extensive damage and loss of life, say researchers.
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