本文介绍了投梭转子与投梭鼻之间撞击的动力学分析，包括速度变化、动能转换及弹性冲击的分析等。
The article makes a dynamic analysis of the impact between the picking bowl and the nose, including the speed variable, the energy transfer and elastic impact.
因为玩耍性打斗包括速度和强度的变化，以及与自我设限有关的角色快速转换。
Since play fighting includes variations in speed and intensity, and quick role reversals involved with self-handicapping.
但是如果我们只是单纯地把注意力放在商业周期上，那么货币供求的震动(包括对货币未来变化的期望)就是决定经济复苏速度的主导因素。
But if we are focusing purely on the business cycle, then shocks to the supply and demand for money (including expectations of future changes) are the primary determinant of the pace of recovery.
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