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　　identical 同一的：the same (very)identical menu

　　identify 识别，鉴别：He identified the coat as his brother’s

　　idle 闲散的，闲置的：idle money

　　ignite点燃，使燃烧：ignite a stove fire with scraps of paper

　　ignore 不顾，不理，忽视：He who ignores history is doomed to repeat it

　　illuminate 照明，照亮，解释，启发，启迪：The room was poorly illuminated by one candle

　　illustrate (用图或例子)说明，阐明：A complicated rule can be illustrated by a simple example

　　immerse 使浸没：He immersed himself in the pool

　　immune免除的，豁免的：Nobody is immune from criticism

　　impact 冲击，撞击：the impact of light on the eye

　　impair 削弱，减少：The output of produce was impaired by the bad weather

　　impartial 公正的，无偏见的：A judge should be impartial

　　implement 工具，器具，用具：new types of farm implements

　　impose 征(税)，加(负担，惩罚等)于(on, upon)：impose additional tax on business expansion

　　impulse 推动，驱动：give an impulse to the development of the friendly relations between the two countries

　　inaccessible 达不到的：The two rocks at the top of the steep hill is at first sight inaccessible

　　incline倾斜：The shaft inclines almost thirty degree

　　incorporate 包含，吸收：His book incorporates his earlier essays

　　incur 招致，引起，遭受：incur sb’s displeasure(envy)

　　indignant 愤怒的，愤慨的：The actress was at the columnist’s personal questions

　　indispensable 必不可少的，必需的(to. for)： Oxygen is indispensable to life

　　induce 引诱，劝使：Nothing will induce me to do that

　　infer (根据已知事实等)推断，推定(from)：From his grades I inferred that he was a good student

　　ingenious (人,头脑等)灵巧的，足智多谋的：an ingenious designer

　　initiate 开始，发起：initiate a conversation

　　innovate 革新，改革，创新(in,on/upon)：innovate on another’s creation

　　inquire 询问，打听：He inquired what the weather was likely to be

　　insert 插入，嵌入：In the pause he managed to inquire a question

　　inspire 鼓舞，激起：His speech inspires the crowd

　　instant 紧急的，急迫的，立即的，即刻的：be in instant need of help

　　institute 学会，协会，学院，研究院：an institute for the blind

　　insulate 隔音，使隔绝(以免受到影响)：We are not insulated from the real world the way we were

　　insult 侮辱，辱骂：She insulted him by calling him a coward

　　insure 保险，给。。。保险：Every father should insure his life for the sake of his wife and children

　　intact 完整无缺的，未经触动的，未受损伤的：an intact family

　　integrate使成一体，使合并(with, into)：integrate traditional Chinese medicine with western medicine

　　interfere 妨碍，冲突(with)：Misty weather interfered with the contact

　　intermittent 间歇的，断断续续的，周期性的：suffer from intermittent headaches

　　intervene 插入，介入：A week intervenes between Christmas and New Year’s Day

　　intricate 错综复杂的，复杂精细的：A detective story usually has an intricate plot

　　invert 使反向，使倒转，使颠倒：The magician inverted the bag to show it was empty

　　irrespective 不考虑的，不顾的(of) ：irrespective of consequences

　　irritate 激怒，使恼怒，使烦躁：be irritated by sb’s insolence

　　justify 证明。。。正当或有理,正确：Such behavior is justified on these grounds

　　knit 编织，编结：She’s knitting her husband a sweater