The distance light can teavel in one year,which is 9 500 000 000 000 kilometers.

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The distance light can teavel in one year,which is 9 500 000 000 000 kilometers.
The distance light can teavel in one year,which is 9 500 000 000 000 kilometers.

The distance light can teavel in one year,which is 9 500 000 000 000 kilometers.
9 500 000 000 000 千里可以旅行一年