研究人员说，如果存在着多重宇宙，它们可能会相互碰撞，并在宇宙微波背景的辐射里留下痕迹。
If multiple universes exist, they may collide with each other and leave behind signs in the cosmic microwave background radiation, researchers say.
你可能可以想象不同的宇宙相互碰撞并留下痕迹和可观察的效应。
It's possible that you could imagine universes bumping into each other and leaving traces, observable effects.
我喜欢下雨天，喜欢趴在阳台上看雨滴滴落在窗沿时碰撞出的水花，晶莹剔透，好像水晶碎裂，却没有痕迹！
I like rainy days, and I like to lie on the balcony watching rain falls in the edge when a splash collision, crystal clear, like crystal fractured, but no traces!
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