Black mambas use their incredible speed to escape threats, not to hunt prey.

黑曼巴用它们闪电般的速度逃离威胁，而不是用来捕食猎物。

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At the event horizon, the escape velocity is equal to the speed of light.

在活动视界里，逃逸速度等于光速。

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At the event horizon, the escape velocity is equal to the speed of light.

在活动视界里，逃逸速度等于光速。

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