By flying in V-formation, the whole flock adds 70% greater flying range than if it flew alone.

排列V字的队列，会使整个鸟群的飞行效率相对于无规则的单独飞行提高至少71%的效率。

Like the geese flying in formation, the whole flock gets 71% greater flying range than if each goose flew on its own.

就像在飞行中的雁队，整个雁队比每只大雁单独飞行的里程要多出71%。