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offensive［əˈfensiv］adj. 冒犯的；进攻性的；极讨厌的
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【记】词根记忆：of + fens（打击） + ive→打击别人→冒犯的
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【例】Mr. Anderson says the cumulative effect of these—apparently trivial, but often offensive—is to make everyday life uneasy, unpredictable and unpleasant. （1998）
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autograph［ˈɔːtəgrɑːf］n. （名人的）亲笔签名 vt. （名人）亲笔签名，题名，署名于…
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【记】词根记忆：auto（自己） + graph（写）→自己亲手写的→亲笔签名
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【例】The famous writer autographed his new books for readers at the bookstore.
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satiate［ˈseiʃieit］vt. 充分满足，使饱满；使生腻
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【记】词根记忆：sat（饱足） + iate→充分满足
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【例】I shall satiate my ardent curiosity with the sight of a part of the world never before visited, and may tread a land never before imprinted by the foot of man.
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【派】satiation（n. 充分满足，厌腻）
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understudy［ˈʌndəˌstʌdi］n. 替补演员，替手 vt. 充当…的替补演员，当…的替手
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【记】联想记忆：under（不够） + study（学习）→学习的不够只能当替手→当…的替手
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【例】①He spent many years as an understudy to that famous movie star.
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②For operational security reasons this system understudied its former.
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【用】词组be an understudy to sb. 是“做某人的替角”的意思。
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edgy［ˈedʒi］adj. 紧张的，急躁的；刀口锐利的，尖锐的
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【例】①The performers were very edgy as they waited for the show to begin.
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②Parents must insure that the edgy knives are kept away from their children.
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suffice［səˈfais］v. 足够，足够…之需；使满足
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【例】These facts should suffice to illustrate how social attitudes of people are changing.
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froth［frɔθ］n. （液体表面上的）泡，泡沫；空谈；浅薄空洞的想法 vi. 起泡沫，冒泡
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【记】联想记忆：青蛙（frog）爱吐泡沫状唾液（froth）
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【例】①The book has too much froth and groundless deduction.
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②Beer and cola beverages froth when they are poured out.