这为机电产品声质量设计效率和质量的提高提供了有力的工具。
All of these have provided a powerful tool for the improvement of the design efficiency and quality of the mechanic-electronics product.
论文最后以工程实例初步论证了新的评价方法，为机电产品声质量设计提供了新的工具。
Finally, the new evaluation method is demonstrated simply by a example. And this method will be useful to the sound quality design of product.
整个系统碰撞，砰的一声，碰撞之后，总的质量和，它们静止不动，因为我已经说过，它们粘在了一起。
So the whole system collides and afterwards you have here the sum of the total masses and it just stands still, because I told you that they are going to stick together.
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