labour grading

• 劳动分级

labour grading的用法和样例：

例句

1. Grading and Standardization of Seed and Seedling of Glycyrrhiza uralensia Fisch.
   乌拉尔甘草种子种苗分级标准制定。
2. Unending subclassifications of tumors and morphologic grading have generally proved to be a sterile pathologic exercise.
   对肿瘤进行无止境的分类和形态学分级证明都是一种毫无效果的病理学活动。