還得細看,不光上個床。。
還看--質與量,周期與振幅,動能與勢能, 平拋與斜射,時域與頻域, damper與spring,
還得細看,不光上個床。。
還看--質與量,周期與振幅,動能與勢能, 平拋與斜射,時域與頻域, damper與spring,
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