| Front | oper |
|---|---|
| Back | 词根含义：work, effort; 助记词：operate，oper（工作）+ate（动词后缀）=》工作起来=》运转 同根词：opera, operable, operant, operate, cooperate |
Tags: 400root-中文版
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Next card: Op opt 词根含义：eye sight; 助记词：optics，opt（眼睛）+ics（科学）=》和眼睛有关的科学=》光学 同根词：hyperopia myopia optics
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