“这些母牛为什么总是选严寒天才生小犊?”比尔的焦躁心情溢于言表。他翻起羊皮大衣的衣领,儿子史葛和我跟着他急步走向牛棚。那时是午夜,在我们亚利桑那州沙漠区的大牧场,气温降至零下二十摄氏度。范伦妲是一头高大的黑白两色乳牛,产期已过了一个月。它身子太大,几乎重达1300公斤,我们很担心。我们的英格兰赫里福特肉用牛在外面的牧地上生产, “Why do these cows always choose cold calves? ” Bill’s anxious mood overflowing. He turned up the collar of the sheepskin coat, his son Scott and I followed him up to the bullpen. It was midnight, at a desert ranch in Arizona, where the temperature dropped to minus twenty degrees Celsius. Fan Lun 妲 is a tall black and white cows, the delivery period has passed a month. It is too much body weight, weighing almost 1300 kg, we are very worried. Our Hereford beef cattle are produced on pasture land outside,