The amount of evapotranspiration of farm land can be calculated by multiplying the largest possible evaporation capacity of water surface with a special coefficient.
用它计算的水面最大可能蒸发量乘以一定系数，便可换算成农田蒸散量。
Construction may be quiet in the U. S. , but in building sites, mine pits, and farm fields in China and India, Caterpillar 's big yellow machines are multiplying fast.
美国的建筑市场可能噤若寒蝉，但是在中国、印度的建筑工地、矿井和农场中，卡特彼勒的黄色大机器正发挥着几倍的速度。
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