grade of limits

例句：

1. 1.The students are expected to achieve a grade of at least 85% in the exams.
   学生们被期望在考试中至少获得85分的分数。
2. 2.The project has a strict grade of limits on waste management.
   该项目对废物管理有严格的限制。
3. 3. The company's performance is evaluated based on its grade of limits on environmental impact.
   公司的业绩是根据其对环境影响的限制程度来评估的。