Spring has sprung on Mars, bring with itthe disappearance of carbon dioxide ice (dry ice) that covers the northpolar sand dunes.
春天在火星上跃动，覆盖在北极沙丘上的二氧化碳干冰消失了。
Spring has sprung on Mars, bring with itthe disappearance of carbon dioxide ice (dry ice) that covers the northpolar sand dunes.
春天在火星上跃动，覆盖在北极沙丘上的二氧化碳干冰消失了。
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