Migrating geese fly in a V formation to save energy.
迁移中的大雁群成v字队形飞是为了节省能量。
Curtiss F9C-2 "Sparrowhawk" fighters, flying in a "v" formation, circa 1933-1935. (Image courtesy of the U. S. Naval Historical Center.)
雀鹰战斗机，以V型编队飞行，约在1933- 1935。(影像提供：美国海军历史中心)。
As the planes sped by, we were impressed by the perfect symmetry of their V-formation.
当飞机飞过时，那完美匀称的V形排列给我们留下了深刻的印象。
As the planes sped by, we were impressed by the perfect symmetry of their V-formation.
当飞机飞过时，那完美匀称的V形排列给我们留下了深刻的印象。
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