1、401. instead of (=in place of) 代替，而不是 402. instructin (=teach) 教.指导.训练某人 403. insurefor 把保险(多少钱); ensure 使安全; assure(of) 使确信,保证 404. insureagainst 保险以防 405. intendfor 打算把给 (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 at interva
2、ls 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 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, jump on (=scold, tell of) 叱责 418. junior to
3、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 421. keepto oneself(=keep secret)不告诉别人 422. to(the best of) ones knowledge 据所知 423. at large(=at liberty, free)在逃, 逍遥法外 2) (=in general) 一般来说, 大体上 3)(=at full length; with details)详细地 424. lean agai
4、nst (背)靠着 425. at least 至少; at most 至多 (not) in the least 一点(也不), 丝毫(也不) 427. at ones leisure 在有空的时候 428. lend itselfthemselves to适合于(某用途) 429. at length (=after a long time, at last)终于 at length (=in detail, thoroughly)详细地 430. go to any length想一切办法, 尽一切力量 431. be liable to (=be subject to)易于.的,应受(
5、罚) be liable for 对应负责任的 433. lie in 在于 434. in life 一生中 for life 终身 436. in the light of (=considering; taking into account) 考虑到, 根据 437. throw light on ( = make clear, explain) 使更为清楚, 提供线索, 阐明 438. in line with(=in agreement with)符合,一致 439. long for(=want very much)渴望,希望得到 for long 很久,很长时间(否定句.疑问句中
6、) 441. before long (=soon)不久, 过了不久以后. 442. in the long run (=in the end)从长远来说,最后; in the short term (从短期来说) 443. (be) at a loss 不知所措 444major in 主修（某课程） 445. as a matter of fact 实际上, 事实是 446. by all means (=at all costs)不惜一切(=certainly) 当然行;by means of用by no means决不447. on memory of 为纪念 448. on the mend (=in the process of recovering) 好转, 在康复中 449. mention sth. to sb. 向某人提起某事 450. at the mercy of (=in the power of) 任摆布, 在支配下 451. be in a mess 乱七八糟, 处境困难 make a mess of 弄乱, 打乱 452. bear(or keep)in mind(=remember)牢记 bring(or call)to mind(=remember)使回想起 w.w.w.k.s.5.u.c.o.m
