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

421. keep…to oneself(=keep secret)不告诉别人

422. to(the best of) one’s knowledge 据…所知

423. at large(=at liberty, free) 在逃, 逍遥法外 at large(=in general) 一般来说, 大体上 at large(=at full length; with details)详细地

424. lean against (背)靠着…

425. at least 至少; at most 至多

426. (not) in the least 一点(也不), 丝毫(也不)

427. at one’s 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(罚)

432. be liable for 对…应负责任的

433. lie in 在于

434. in life 一生中

435. 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

440. for long 很久,很长时间(否定句.疑问句中)

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

444．major 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…;