离开就切除
发表于 2025-3-25 04:44:58
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拱形大桥
发表于 2025-3-25 11:08:46
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headlong
发表于 2025-3-25 11:59:52
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TAP
发表于 2025-3-25 18:17:38
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Ledger
发表于 2025-3-25 21:26:51
Total Solar Eclipses and How to Observe Themtions under consideration were of kind, not of degree. But even when all decisions of kind have been made, so that all the qualitative aspects are settled, there remains the easier problem of fixing all the quantities involved. The solution of this problem we shall call ‘optimisation’.
山顶可休息
发表于 2025-3-26 03:18:46
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Sinus-Rhythm
发表于 2025-3-26 07:41:23
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drusen
发表于 2025-3-26 10:17:00
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heckle
发表于 2025-3-26 15:20:51
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N斯巴达人
发表于 2025-3-26 17:12:15
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