小視頻裏經常有高鐵動態效果圖，中西部很多都是大山裏麵穿行，山連著山洞連著洞。中國的東西縱深寬，西部連綿的山脈就是天然屏障

來源: Amita 於 2023-06-05 08:20:46 [舊帖] [給我悄悄話] 本文已被閱讀：次

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