記得有本科幻小說就是這樣的:來個地道,用重力帶你下去,用動能走出來。
回答: YES, DIR THROUH CENTER OF DIQIU...回複:第一張圖我覺得是箭頭,箭頭指向下,到中國最近的路是地下
由 tianfangye
於 2012-03-15 06:12:40
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