inferior [in'fi?ri?] a. (to）下等的，下级的；差的，次的；n. 下级，晚辈
[衍生] inferiority n. 自卑，卑微，低劣
[搭配] be inferior to低于，劣于
[例句] A cheaper camera is not always inferior to a more
expensive one.
[精译] 廉价照相机的质量并不总比昂贵的差。
ingredient [in'ɡri:dj?nt] n. 组成部分，成分，原料
[例句] Humor is an effective ingredient of a speech.
[精译] 幽默是演讲中的一个有效成分。
innocent ['in?snt] a. ① (of）清白的，无罪的；②天真的，单纯的，无知的
[衍生] innocence n. 清白，天真
[搭配] be innocent about对…一无所知
[例句] His friends asserted that he was innocent.
[精译] 他的朋友们断言他是清白的。
innumerable [i'nju:m?r?bl] a. 无数的，数不清的
[速记] in-不+numer-数目+-able能...的→不能数清楚的→无数的，数不清的
[衍生] numerable a. 可数的，可计算的
[例句] The sum total of innumerable relative truths constitute
absolute truth.
[精译] 无数的相对真理之总和，就是绝对的真理。
instinct ['insti?kt] n. 本能，直觉
[速记] in-内+stinct-刺激→内在的刺激→本能
[衍生] instinctive a. 本能的，天性的
[例句] It was as though we were being guided by instinct.
[精译] 似乎本能在引导着我们。
intimate ['intim?t] a. 亲密的，密切的
[例句] I'd like to be her intimate friend and good companion.
[精译] 我愿做她的亲密朋友和好伙伴。
invalid ['inv?li:d] n. 病人，病弱者；[in'v?lid] a. 有病的，伤残的；②无效的，作废的
[速记] in-无+valid-有效的,正当的→无效的
[衍生] valid a. 有效的；invalidate v. 使无效，使作废；
invalidity n. 无效，无价值
[例句] The invalid gained colour under the doctor's care.
[精译] 病人在医生的治疗下，脸色逐浙红润。
[例句] Unless a check is signed, it is invalid.
[精译] 支票除非签了名，否则是无效的。
invasion [in'vei??n] n. 侵入，侵略
[速记] in-进入+vas-走+-ion表名词→走进去→入侵
[衍生] invade n. 入侵，侵略；invader n. 侵路者
[例句] We love peace and hate invasion.
[精译] 我们热爱和平，憎恨侵略。
invisible [in'viz?bl] a. 看不见的，无形的
[速记] in-不,无,非+visible-看得见的→看不见的,无形的
[搭配] be invisible to为…所看不见
[例句] Some stars are invisible to the naked eye.
[精译] 有些星体肉眼是看不见的。
[例句] Governed by supply and demand, price is the invisible
hand in economics.
[精译] 在经济生活中，价格是看不见的手，取决于供给与需求关系。
irony ['ai?r?ni] n. 反话，讽刺
[衍生] ironic a. 讽刺的，嘲弄的
[例句] The great irony is that despite all his explanation nobody believed him.
[精译] 最具讽刺意味的是：尽管他竭力解释，可没一个人相信他。
irritate ['iriteit] vt. 激怒；刺激；使急躁
[衍生] irritated a. 恼怒的；irritating a. 使恼怒的，气人的；
irritation n. 刺激，烦恼
[例句] I am becoming more and more irritated by his selfish behaviour.
[精译] 我对他那种自私的行为愈加恼怒起来。
jealous ['d?el?s] a. (of）妒忌的；猜疑的
[搭配] be jealous of 嫉妒......
[例句] He was jealous of his friend's reputation.
[精译] 他妒忌朋友的声誉。
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