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
decline = de(向下) + clin(倾斜) + e(名词后缀) = 向下倾斜→减少；下降
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
gradeation = grade(级别) + ation(过程) = 每个级别的过程=渐变
aberration = ab(离开) + err(漫游) + ation(表结果) = 离开常规去漫游→偏差
acceleration = ac(加强) + celer(快) + ation(表结果) = n.加快，加速
向下降级→退化
degradation
常考释义
In both mountains and deserts,slow-growing trees are often the main sources of fuel and water supplies may belimited or vulnerable to degradation through heavy use.
在山区和沙漠地区，生长缓慢的树木是燃料的主要来源，水源供给也会受到乱砍滥伐的影响。
来源于：剑雅5-Test4n. 退化；降格，降级；堕落
And fantasy rape is not, of course, like real rape, with all the pain, terror and degradation involved.
当然，幻想被强奸并不像真的被强奸，真的被强奸还伴随着痛苦、恐惧和堕落。
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