They mined gold, felled timber, dug canals or lay rails, most often in harsh areas to which free labor could never be enticed.
他们采金，伐木，挖掘运河，或者铺铁路，多数都是在对自由劳工没有任何吸引力的荒芜地区。
He felled, peeled, and hewed his own timber.
他自己砍树、剥皮并劈成木材。
Forested areas have been expanding every year, with the increase in standing timber greater than that of felled lumber.
森林面积每年都在增加，林木生长量大于消耗量。
Forested areas have been expanding every year, with the increase in standing timber greater than that of felled lumber.
森林面积每年都在增加，林木生长量大于消耗量。
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