All of these have provided a powerful tool for the improvement of the design efficiency and quality of the mechanic-electronics product.
2
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.
3
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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