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(fā)，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
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(fā)，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