1·One acre of farmland used for raising cows can produce 250 pounds of beef.
一英亩用于养牛的农田可以生产250磅牛肉。
2·The national average farm size is around 440 acres, but his is only one acre.
全国平均农场面积约为440英亩，但他的农场只有一英亩。
3·One acre of farmland used for crop production can produce 1,500 pounds of tomatoes.
一英亩的农田可以生产1500磅西红柿。
4·I grow hardly a half acre of corn in narrow strips, with clover between the strips, on land that is almost level.
我艰难地在狭长地带上种了半英亩的玉米，在这之间一块几乎平坦的地上种了三叶草。
5·Anything that can increase farming efficiency—the amount of crops we can produce per acre of land—will be extremely useful.
任何能提高农业效率的东西——能提高我们每英亩土地生产的农作物数量的东西——都是非常有用的。