Since 1914, scientists have known that birds flying in formation—a V-shape—expend less energy.
自1914年以来,科学家们已经知道,以V字形队形飞行的鸟类消耗的能量更少。
Canada geese flying in a V shape can fly seventy percent farther without having a rest than the birds flying alone.
与单独飞行的鸟类相比,以V形飞行的加拿大鹅在没有休息的情况下可以多飞行百分之七十的距离。
Canada geese flying in a V shape can fly seventeen percent farther without having a rest than the birds flying alone.
与单独飞行的鸟类相比,以 V 形飞行的加拿大鹅在没有休息的情况下可以多飞17%。
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