而在美国，这一比例仅为3.6%，底特律的三大汽车巨头只在轻型卡车上才安装柴油发动机，比如"道奇大公羊"型皮卡。
Detroit's Big Three manufacturers use diesel engines only in light trucks, such as the big Dodge Ram pickup.
当他十六岁在底特律的工作间做事时，制造和安装发动机就成了他的工作。
Making and installing them was the business of the Detroit workshop that he joined at the age of sixteen.
年轻的亨利没有留在农场，承传父业，而是离家去了底特律，成为了一名发动机修理工。
Instead of working on the family farm, young Henry went off to Detroit and became an engine-repairer.
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