graded
adj. 分等级的；按年级分的
v. 分级（grade 的过去式和过去分词）
例句
Dust masks are graded according to the protection they offer.
防尘面具根据其提供的防护而分级。
《柯林斯英汉双解大词典》
The best students are graded A.
最优秀的学生评为甲等。
《牛津词典》
Ten beaches were graded as acceptable.
有十个沙滩属于可接受的那一类。
