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【记】词根记忆：ex + cav（洞） + ate→挖出洞→发掘
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【例】Although the buried city was excavated, it was partly destroyed.
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stark［stɑːk］adj. 显而易见的；光秃秃的；阴郁的；完全的 adv. 完全地，十足地
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【记】联想记忆：star（星球） + k→宇宙中的大部分星球都是光秃秃的
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【例】①The dark stones stood out in stark contrast to the white snow and ice.
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②The members are discontented with the stark social and economic differences between the two communities.
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converge［kənˈvəːdʒ］vi. 聚集，集中一点，汇合
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【记】词根记忆：con + verg（转） + e→转到一起→聚集
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【例】Our interests seemed to converge at this point.
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【用】词组converge on / at表示“（在一点上）汇合，互相靠拢”。
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fanciful［ˈfænsiful］adj. 爱空想的，富幻想的，非理性的
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【例】The conclusion is destined to be a failure because it is usually based on fanciful judgment.
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【派】fantasise / fantasize（v. 想象，幻想）
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insanity［inˈsæniti］n. 疯狂，精神错乱
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【记】词根记忆：in（无） + san（健康的） + ity→精神不健康的→精神错乱
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【例】Genius is but one remove from insanity.
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coax［kəuks］vt. 哄诱，劝诱；用诱哄得到，诱取
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【例】①Ann coaxed her friend into accompanying her to go shopping.
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②The man coaxed the information of his opponent out of him.
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【用】词组coax sb. into doing sth. 是“劝诱…做…”的意思。
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extent［ikˈstent］n. 范围，广度，长度；程度，限度
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【记】词根记忆：ex（出） + tent（伸展）→伸展出的距离→范围