求翻译：镁合金作为最轻的结构材料，具有高比强度、刚度、优良的加工性能及阻尼性能等特性，但由于其晶体结构为密排六方结构，室温下塑性变形能力很差，因此镁合金结构件大多采用压力铸造方式加工，而压铸镁合金的性能较低，故其应用范围受到很大限制，尤其不能应用于高温条件下。而变形镁合金除了具有一般镁合金的特性外，相对于铸造镁合金而言，它具有更优异的塑性变形能力，更高的强度和韧性。因此，本文选用常见的AZ31变形镁合金作为基体合金进行研究。是什么意思？

Magnesium alloy as the lightest structural material with high specific strength, stiffness, excellent processing performance and damping performance characteristics, but because of its crystal structure of the hcp structure at room temperature plastic deformation capacity is poor, therefore magnesiu

Magnesium Alloy as the lightest structural materials with high specific strength and stiffness, excellent processing performance and damping performance, and other features, but because of its crystalline structure for the key, the 6 party structure at room temperature plastic deformation capacity i

Magnesium alloy as most