很輕易可以upgrade到新型的汽車和飛機。
休息去了。
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晚安
-宗闋-
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07/01/2018 postreply
20:39:53
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簡單從能耗來說高鐵要低於飛機,你想飛機要把那些質量的東西提升到1萬米高空,要消耗多少能量呀
-547788-
♂
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07/01/2018 postreply
22:34:20
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你不知道世界上有空氣阻力這種東西嘛?
-randomeSell-
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07/02/2018 postreply
05:03:15
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地表空氣密度與一萬米高度的空氣密度沒有數量級的差別
-547788-
♂
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07/02/2018 postreply
08:50:53
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