382.in ignorance of不知道……
383.be ignorant of (=lacking knowledge)對……不了解,不知道
384.(an) impact (on)對……的強烈影響
385.impose...on把……強加給
386.impress...on給……留下印象
387.make (leave) an impression on sb. =give sb. an impression給……留下印象
388.under the impression that有……的印象,認為
389.improve sth. (make sth. better)把原物改進
improve on (=produce or be sth. better than...)另做一物比原物更好
390.improve in (=get better)有改進,好些
391.improvement in表示原物有改進,好轉
392.include...in把……列在……里面
393.inclusive of把……包括在內
394.independent of獨立的,不受約束的
395.indicative of表明,說明
396.be indifferent to (=not interested in)對……漠不關心,冷淡,不在乎
397.(be) inferior to (=less good in quality or value)比……差;superior to比……好
398.inform sb. of sth.通知,告訴
399.be innocent of無罪的,無辜的
400.insist on (=order sth. to happen)堅持要
401.instead of (in place of)代替,而不是……
402.instruct...in (=teach)教,指導,訓練某人……
403.insure... for把……保險(多少錢);ensure使安全;assure...(of)使……確信,保證
404.insure...against保險……以防
405.intend...for打算把……給
406.(be) intent on專心致志,堅決
407.in the interests of符合……的利益
be interested in對……感興趣
408.interfere in干涉,interfere with打攪,干擾
409.at intervals每隔一會兒,每隔一段距離
410.intervene in干預
411.invest in投資
412.be involved in (=become connected or concerned)卷入,參加
413.by itself (=alone, without help)單獨地,靠自己
414.in itself本身;of itself自發,自然
415.be jealous of妒忌
416.jump at (=to be eager to accept)搶著接受,
417.jump on (=scold, tell of)叱責
418.junior to sb.年紀較……輕,職位較……低
419.(be) keen on喜愛,渴望
420.keep a close watch on (=keep a sharp lookout for)密切注視
421.keep...to oneself (=keep secret)不告訴別人
422.to (the best of) one’s knowledge據……所知
423.at large (=at liberty, free)在逃,逍遙法外
at large (= in general) 一般來說,體上
at large (= at full length; with details) 詳細地
424.lean against(背)靠著……
425.at least 至少;at most 至多
426.(not) in the least 一點(也不),絲毫(也不)
427.at one’s leisure 在……有空的時候
428.lend itself/themselves to 適合于(某用途)
429.at length (=after a long time,at last) 終于