The correct engineering concept should be using a correct composition design method to further raise the toughness under the prerequisite of obtaining a high hardness.
正确的工程理念是在获得高硬度的前提下，通过采用正确的成分设计方法，进一步提高韧性。
If his theory is correct, fiddling with the composition of box interiors could be a good way for the wine industry to control the concentration of unpleasant chemicals.
如果他的理论正确，通过变包装的内层成分来控制令人不悦化学物质浓度，对于葡萄酒业而言是一个好方法。
Correct the minor mistakes in the composition.
把作文中的小错误改一改。
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