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| 1. | An investigation of the relationship between inventories, shipments and sales may provide additional |
| 调查库存、装运量和销售量之间的关系可以提供新的洞察力。 |
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| 2. | Exercises in bold in the Problem Sets are especially important and typically present some additional |
| 作业中粗体字的练习尤其重要,典型的表现了本课程中一些额外的深度知识。 |
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| 3. | Additional insight is gained by examining the elastic collision of equally massive particles in the center-of-mass |
| 对质量相等的两质点的弹性碰撞更彻底的理解，可通过质心参照系而获得。 |
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