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【例】①The research shows the optimum distance to watch the animal is about 20 meters.
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②Organization carried out researches into optimum population size in relation to environmental sustainability, particularly in the UK.
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superfluous［sjuːˈpəːfluəs］adj. 过剩的，多余的
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【记】词根记忆：super（超过） + flu（流） + ous→流得过多→多余的
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【例】①We are not so fond of vain and superfluous ceremonies.
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②In the beginning of a project, we still need to do many revisions and no one’s comments are superfluous.
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sidestep［ˈsaidstep］v. 闪躲（攻击等）而避到一旁；规避，回避
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【记】组合词：side（旁边） + step（举步）→往旁边走→回避
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【例】Pioneering low fares airline Southwest unveils sharply higher profits, confirming its status as the only carrier to sidestep the air travel slump.
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expunge［ikˈspʌndʒ］vt. 删去，除去
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【例】I corrected some factual slips and expunged some repetitions in my composition.
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oblivion［əˈbliviən］n. 忘记，遗忘
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【记】词根记忆：ob（否定） + liv（生命） + ion→没了生命，就被忘却→忘记，遗忘
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【例】①Sleep became to him oblivion and each day when he awoke, he awoke with regret.
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②The pain made me long for oblivion.
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paralytic［ˌpærəˈlitik］adj. 瘫痪的，麻痹的，中风的；烂醉的
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【记】词根记忆：para（半） + lyt（分开） + ic→身体裂开的→瘫痪的
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【例】①Paralytic shellfish poison is an illness caused by eating contaminated shellfish.
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②Elizabeth got completely paralytic last night.
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Victory won’t come to me unless I go to it.
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胜利是不会向我走来的，我必须自己走向胜利。
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——美国女诗人 穆尔（M. Moore, American poetess）
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