#考研##考研英语#
英语长难句
Between 1940 and 1980 in the United States, for example, per-acre yields of corn tripled, those of wheat and soybeans doubled, and farm output per hour of farm work increased almost 10 fold as capital was substituted for labour.
例如，美国在 1940～1980 期间玉米的亩产量增加了 2 倍，小麦和大豆增加了 1 倍换
算为现金计算，每工时的农业产量增加了近 9 倍。