清醒
发表于 2025-3-26 22:31:27
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Mnemonics
发表于 2025-3-27 01:44:56
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Alveolar-Bone
发表于 2025-3-27 05:52:53
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粗鲁性质
发表于 2025-3-27 11:04:17
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严厉批评
发表于 2025-3-27 14:48:50
Rotations,in turn occupy a new position p′ and the correspondence between points . and p′ is a one-to-one relation. In this correspondence, point . corresponds to itself: lengths and angles as well as the direction of the trihedrons are all conserved.
Champion
发表于 2025-3-27 19:37:14
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