Two-five months later, effectiveness assessment was made by the PVS standard scale. 按持续性植物状态评分标准进行疗效评定。
Finally, it is also possible that the grading system itself is easier for the students in Marlee as opposed to the system in Sanlee. 最后，还有可能马里区学生的评分标准比三里区的较为容易。
