VIRAL
发表于 2025-3-21 18:05:34
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strain
发表于 2025-3-21 21:39:51
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柔软
发表于 2025-3-22 01:44:17
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hyperuricemia
发表于 2025-3-22 07:41:15
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剥皮
发表于 2025-3-22 11:24:28
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Acquired
发表于 2025-3-22 16:28:01
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anchor
发表于 2025-3-22 21:08:31
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G-spot
发表于 2025-3-23 01:08:22
The Higher Homotopy Groups,tal group was recognized early in the development of algebraic topology. Definitions of these “higher homotopy groups” were given in the years 1932–1935 by Eduard Cech (1893–1960) and Witold Hurewicz (1904–1956). It was Hurewicz who gave the most satisfactory definition and proved the fundamental properties.
难解
发表于 2025-3-23 02:04:36
The Fundamental Group, that two closed paths in a space are homotopic provided that each of them can be “continuously deformed into the other.” In Figure 4.1, for example, paths . and . are homotopic to each other and . is homotopic to a constant path. Path . is not homotopic to either . or . since neither . nor . can be pulled across the hole that they enclose.
裁决
发表于 2025-3-23 06:59:24
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