For most of human history, cattle, sheep and goats grazed on land that wasn't suitable for ploughing, and in doing so they converted inedible grass into edible meat and milk.
在人类的大部分历史时期，人们在不适合耕种的土地上放牧牛羊，这样它们就把不能食用的草转变成了肉和奶。
2
When they were half-way to the main road they came on a man of my father’s who was ploughing, and this somehow brought back remembrance of the wrong.
快走到大路上时，他们撞见爹爹手下一个耕地的人，然后不知怎么的，爹爹又记起恨来。
3
Both men began life down on the farm and both quickly discovered they were more interested in engineering and building businesses than ploughing fields.