Then one day, someone shows up and extols the virtues of a new tree-cutting paradigm, the chainsaw.
2
在蒸汽机、蒸汽动力机车、电锯和伐木归堆机等工具问世之前，伐木工人依靠斧头、手锯和驮畜进行作业。
Loggers relied on axes, handsaws and draft animals before the advent of steam engines and gas-powered vehicles, along with chainsaws and harvesting machines such as the feller-buncher.
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