GRE常见词根词汇（25）
<p> <span word="grad">grad</span></p><p> <span word="grad">grad</span> = step,go,grade 步，走，级</p><p> 572.<span word="gradual">gradual</span> 〔 <span word="grad">grad</span> 步，-<span word="ual">ual</span> 形容词后缀，的 〕逐步的，逐渐的</p><p> 573.<span word="retrograde">retrograde</span> 〔 <span word="retro">retro</span>- 向后，<span word="grad">grad</span> 步，行走;向后走 〕后退，退步，逆行</p><p> 574.<span word="retrogradation">retrogradation</span> 〔 见上，-<span word="ation">ation</span> 名词后缀 〕后退，退步，逆行</p><p> 575.<span word="graduate">graduate</span> 〔 <span word="grad">grad</span> 步，级，-<span word="u">u</span>- ，-<span word="ate">ate</span> 动词后缀;在学业上走完某一步,在学业上完成某一级 〕毕业; 〔 转为 〕毕业生</p><p> 576.<span word="graduation">graduation</span> 〔 见上，-<span word="ation">ation</span> 名词后缀 〕毕业</p><p> 577.<span word="undergraduate">undergraduate</span> 〔 <span word="under">under</span>- 低于，不够，不到，不足， <span word="graduate">graduate</span> 毕业生 〕尚未毕业者，大学肄业生</p><p> 578.<span word="postgraduate">postgraduate</span> 〔 <span word="post">post</span>- 后，在之后，见上 〕大学毕业后的;研究生</p><p> 579.<span word="degrade">degrade</span>〔 <span word="de">de</span>- 下，向下，<span word="grad">grad</span> 步，走，级;往下走,降级 〕下降，堕落，退化，使降级，贬默</p><p> 580.<span word="degradation">degradation</span> 〔 见上，-<span word="ation">ation</span> 名词后缀 〕堕落，退化，降级，贬黜</p><p> 581.<span word="grade">grade</span> 等级，年级，级别，阶段，程度</p><p> 582.<span word="gradation">gradation</span> 〔 见上，-<span word="ation">ation</span> 名词后缀 〕等级，分等，分级</p><p> 583.<span word="upgrade">upgrade</span> 〔 <span word="up">up</span> 上，<span word="grad">grad</span> 步，级 〕上升，升级，提升，上坡</p><p> 584.<span word="downgrade">downgrade</span> 〔 <span word="down">down</span> 下，<span word="grad">grad</span> 步，级 〕降低，贬低，降级，下坡</p>
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