But have no fear, there is no risk of collision, at least for the next century or so (forecasting much beyond that is tricky).
但是至少到下个世纪为止无需担心有碰撞的危险(也没有预报的那么棘手)。
No obvious physical evidence of such a collision has been found.
但调查人员并没有找到碰撞发生的明显物证。
But until now, no such asteroid-asteroid collision has been caught "in the act".
但是,直到今天,我们都没有“当场”捕捉到这种小行星对小行星的碰撞。
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