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The existence of black holes that trap everything including light.
宇宙中存在着黑洞，它会捕获任何东西其中也包括光在内。
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They took all the surgical equipment with them, including light sources.
他们随身携带了所有的手术设备，包括手术灯。
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They took all the surgical equipment with them, including light sources.
他们随身携带了所有的手术设备，包括手术灯。
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