frugal
发表于 2025-3-23 13:42:35
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CHURL
发表于 2025-3-23 17:25:12
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商店街
发表于 2025-3-23 20:03:33
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Microgram
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fulmination
发表于 2025-3-24 04:49:58
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Jubilation
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Cirrhosis
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covert
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Melanocytes
发表于 2025-3-24 19:21:54
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枪支
发表于 2025-3-25 02:53:17
Nicholas Wrighting style.Despite their apparent simplicity, the behaviour of pendulums can be remarkably complicated. Historically, pendulums for specific purposes have been developed using a combination of simplified theory and trial and error. There do not appear to be any introductory books on pendulums, writte