得意牛
发表于 2025-4-1 04:16:51
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猛然一拉
发表于 2025-4-1 07:18:57
Carlo Pellegrino,Flora Faleschiniity with another like quantity. For example, mass is a physical quantity and the amount of matter in one mass can be measured and compared with the amount of matter in another mass. Thus we can say that a 10 kg mass, for example, has twice the amount of matter of a 5 kg mass. Similarly time is a phy
唠叨
发表于 2025-4-1 10:43:10
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