1·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。
2·Other birds flying in the upwash experience reduced drag, and spend less energy propelling themselves.
其他鸟类在上升流中飞行时受到的阻力减小了，它们在推动自身前进时消耗的能量也减少了。
3·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。
4·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％。
5·"I wish they were all turned into ravens!" And when he looked up, he saw seven black birds flying away.
“我希望他们都变成乌鸦！”他抬头的时候，看到七只黑色的鸟飞走了。
6·Look at those birds flying over the lake".
看那些在湖上飞的鸟儿。
7·He saw many birds flying in the garden.
他看到好多小鸟在花园里飞来飞去。
8·You can see the birds flying every day.
每天你都可以看到鸟儿飞过。
9·Look, there are three birds flying in the sky.
看，有三个鸟在天上飞。
10·Added birds flying through the level at the background.
增加了鸟儿飞过关卡的背景。