变质程度；变质级别
The coal has lower metamorphic grade with high ash.
煤的变质程度低，灰分高。
A new thought is proposed to forecast mineralization of endogenetic deposits based on metamorphic grade of coal.
据此提出了根据煤变质程度进行内生矿床成矿预测的新思路。
Besides metamorphic grade, the nature of original rocks and the precursor of carbonaceous material may also influence graphitization.
除了变质程度以外，原岩的类型和碳的原始物质的种类也会影响碳的石墨化作用。
The Panxi (Panzhihua-Xichang) granulites have long been recognized as the oldest rock of the crystalline basement with the highest metamorphic grade on the western margin of the Yangtze Block.
攀枝花-西昌（攀西）麻粒岩一直被认为是扬子陆块西缘变质程度最高和最古老的结晶基底岩石。
The deformation was changing from plastic intensity to weakness and the metamorphic facies ranged from amphibolite to low-grade greenschist.
变形由强烈的塑性变形到弱变形，变质由角闪岩相到低绿片岩相及低于低绿片岩相。
“Metamorphic grade”是地质学中的专业术语，指岩石在变质作用过程中所经历的温度、压力条件的强度等级。以下是详细解释：
指通过岩石中特定矿物组合（如绿泥石、蓝晶石等）判断变质作用的强度。例如：
这一概念对理解岩石圈动力学和资源勘查具有重要意义。
metamorphic是一个形容词，用于描述经历了变质过程的物质或岩石。变质是指在高温和高压下，物质的组成和结构发生了变化，从而形成了一种新的物质或岩石。例如，石灰岩在高温和高压下会变成大理石。
grade是一个名词，用于描述事物的等级或程度。在地质学中，grade通常指变质岩石的等级，这是根据岩石变质的程度和温度压力的大小来划分的。岩石的等级越高，变质的程度就越高。
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