391. improvement in 表示原物有改进,好转
392. include…in 把…列在…里面
393. inclusive of 把…包括在内
394. independent of 独立的,不受约束的
395. indicative of 表明, 说明
396. be indifferent to (=not interested in)对…漠不关心, 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, 告诉
399. be innocent of 无罪的,无辜的
400. insist on (=order sth. to happen) 坚持要
401. instead of (=in place of) 代替，而不是…
402. instruct…in (=teach) 教.指导.训练某人…
403. insure…for 把…保险(多少钱); ensure 使安全; assure…(of) 使…确信,保证
404. insure…against 保险…以防
405. intend…for 打算把…给
406. (be) intent on 专心致志, 坚决
407. in the interests of 符合…的利益 be interested in 对…感兴趣
408. interfere in干涉, interfere with打搅,干扰
409. at intervals 每隔一会儿, 每隔一段距离
410. intervene in 干预
411. invest in 投资
412. be involved in (=become connected or concerned) 卷入, 参加
413. by itself (=alone, without help)单独地,靠自己
414. in itself 本身; of itself 自发,自然
415. be jealous of 妒忌
416. jump at (=to be eager to accept)抢着接受,
417. jump on (=scold, tell of) 叱责
418. junior to sb. 年纪较…轻, 职位较…低.
419. (be) keen on 喜爱, 渴望
420. keep a close watch on ( =keep a sharp lookout for) 密切注视
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