Anthropoid
发表于 2025-3-23 12:33:55
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小溪
发表于 2025-3-23 16:33:13
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escalate
发表于 2025-3-23 18:51:30
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大暴雨
发表于 2025-3-24 01:58:27
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宣称
发表于 2025-3-24 04:37:06
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hankering
发表于 2025-3-24 08:50:56
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Liberate
发表于 2025-3-24 11:24:41
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古代
发表于 2025-3-24 18:13:06
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单挑
发表于 2025-3-24 21:29:24
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媒介
发表于 2025-3-25 02:08:08
with small-amplitude phenomena, and consequently a linear description is usuallyapplicable. Disturbances are governed by the properties of the medium in which they occur, and the governing equations are the equations of continuum mechanics, which apply equally to gases, liquids, and solids. These i