存在于外层空间或从外层空间落到地球的尘埃。
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存在于外层空间或从外层空间落到地球的尘埃。；宇宙尘埃
Dust which exists in outer space or has fallen from outer space to Earth.
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存在于外层空间或从外层空间落到地球的尘埃。
Dust which exists in outer space or has fallen from outer space to Earth.
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