显微组织由细小动态再结晶和未变形的大晶粒组成。

The microstructure of AZ31 magnesium was consist of dynamic recrystallization grain and large grain .

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应选购外观整洁、完整未变形的产品，产品标志应完整、清晰，即有正规的厂名、厂址，有中文说明。

Choose the products with tidy look , complete sharp and clear production mark, which includes norm factory name and address , and Chinese description.

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第四纪的沉积物大部分未变形。

The Quaternary sediments are largely undeformed.

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