Expediency
发表于 2025-3-30 11:47:52
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inveigh
发表于 2025-3-30 14:35:07
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一条卷发
发表于 2025-3-30 17:14:40
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guardianship
发表于 2025-3-30 21:14:56
Book 20001st editioneenth century, the trees were fully grown and ready to yield fruit. It was in this envi ronment that the study of gas dynamics gave birth to the theory of quasilinear hyperbolic systems in divergence form, commonly called "hyperbolic conserva tion laws"; and these two subjects have been traveling