high-grading 乱采富矿
high grading road 高等级公路
high density grading 高密度级配
High Strength Grading 高标号
high temperature grading 高温分级
同义词： high-grade top-quality top-grade
以上来源于: WordNet
youdao
The conference also introduced the new system's grading level, which will range from a low to a high, with nine grades in total.
会上还介绍了新体系的等级量表，共包含了从低到高的九个等级。
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