Every morning the old man went out to chop down trees.

每天一早，老人就去森林伐木。

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The stone axes used to chop down trees to make these dwellings were far superior to any that the Stone Age hunter-gatherers used.

他们用于砍树造房子的石斧比石器时代采猎者所用的要先进得多。

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Even in tropical countries, where most deforestation takes place, Brazil is not alone in becoming more reluctant to chop down trees.

连一些毁林成风的热带国家也同巴西一道，对砍伐树木的态度日趋谨慎。

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Just a few days before the stock market began collapsing last September, the Aikmans hired a contractor to chop down trees and excavate a pond by their home.

CNN: Rethinking family finances in a recession

The answer provided by Mr Thom's maths was to chop down old trees, which foresters said they knew anyway.

ECONOMIST: Ren�� Thom