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The damage of materials is called as one of the most complex and difficult problems in mechanics.
材料的损伤和破坏被称为力学中最复杂、最困难的难题。
youdao
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The damage of materials is called as one of the most complex and difficult problems in mechanics.
材料的损伤和破坏被称为力学中最复杂、最困难的难题。
youdao