现在的生产过程高度机械化。
因为你在地球层面上是高度机械化的。
交通和家庭供热系统主要依靠石油，因为大部分农业的高度机械化，食品供应也靠石油。
The transport and domestic heating systems mostly depend on oil. So does the food supply, because most agriculture is highly mechanized. Modern farming requires things which are all oil-based.
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