4周搞定2000+托福核心词
biodegradable = bio(生物) + de(向下) + grad(级别) + able(能…的) = 生物上可以向下降级的→可生物降解的
degradation = de(向下) + grad(级别) + ation(表结果) = 向下降级→退化
ing = ing(表名词) = 养蜂业
being = be(使…成为) + ing(表名词) = 生命
级别→分级
grading
常考释义
n. 评分；评级【教育】
Our teacher is known for her fairness in grading pupils.
我们的老师以给学生评分公平著称。
n. 分等；分级；分类
If a professional grading system existed, executives would never settle for a D in their careers.
如果有专业的分级制度，经理人们永远不会希望在职业生涯中获得D。
n. 等级；级别
All the responses were given a grading.
所有回复都评了等级。
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