HAWK
发表于 2025-3-27 00:38:41
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连锁,连串
发表于 2025-3-27 02:47:07
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Armada
发表于 2025-3-27 05:41:31
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mercenary
发表于 2025-3-27 10:27:40
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云状
发表于 2025-3-27 17:38:57
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凌辱
发表于 2025-3-27 18:07:30
978-3-540-40448-4Springer-Verlag Berlin Heidelberg 2004
好色
发表于 2025-3-27 22:25:39
Lectures on Partial Differential Equations978-3-662-05441-3Series ISSN 0172-5939 Series E-ISSN 2191-6675
玛瑙
发表于 2025-3-28 03:50:52
,The Vibrating String (d’Alembert’s Method),We consider a string, which can be pictured as the actual string of a musical instrument, attached to a sounding board, as in Fig. 4.1.
泄露
发表于 2025-3-28 07:30:39
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flaggy
发表于 2025-3-28 11:36:16
The Theory of Oscillations. The Variational Principle,It is an experimental fact well-known to physicists that the laws of nature can be described by variational principles. The absence of rational grounds for this fact has generated attempts to interpret it theologically, philosophically, and in other ways, as, for example, in the writings of Voltaire, Maupertuis and others in the collection ..