蝙蝠是唯一能飞很远的哺乳动物，但它们还有另一种能力。
Bats are the only mammals that can fly a great distance, but they have another ability.
候鸟要在冬巢和夏巢之间飞很远的距离。
Migratory birds fly long distances between a winter home and a summer home.
他们不用飞很远，因为我家窗户外面巨大的枫树为他们提供了一个很好的练习起飞与降落的场所。
They didn't travel far as the huge Maple tree just outside our window provided a very cool landing and launching practice pad.
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