据说如果你看到飞行的蝙蝠，或听到它们的叫声，你就会倒霉。
It is said to be bad luck if you see bats flying and hear their cries.
他们蠕动，鸣叫声，飞行，痒痛，筋斗，亲吻和自旋对双跨页白色背景。
They wiggle, purr, fly, tickle, somersault, kiss, and spin against the white background of double-page spreads.
它飞行时，它发出一连串的叫声，其频率甚高，人类没法听见。
As it flies, it utters a series of cries that are so high-pitched a person cannot hear them.
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