他们飞得很高，几乎达到了天空。
有时候他们在城镇上空时飞得很高，很难准确看清它们在沿着什么飞行。
Sometimes when they're flying high above a town or city, it's difficult to see exactly what they are following.
他们已经飞得很高，瀑布雷鸣般的巨响已变得很轻。但他们飞行的高度还不能越过峭壁。
They were flying so high already that the thunder of those falls could only just be heard as a small, thin sound, but they were not yet high enough to fly over the top of the cliffs.
他们已经飞得很高，瀑布雷鸣般的巨响已变得很轻。但他们飞行的高度还不能越过峭壁。
They were flying so high already that the thunder of those falls could only just be heard as a small, thin sound, but they were not yet high enough to fly over the top of the cliffs.
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