3fb8c32fffd711ab6fb8d38a4683746f7ccb95c78c5f58c07aff510c2f76074c1dff3b414119e8305db2a97e33

왜 t1=t2야..? A가 관찰할때 q까지의 거리만 늘어나는거 아니여?

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