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 itself/themselves 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...; by no
means 完全不, 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

• agreement [ə´gri:mənt] n.同意；一致；协议 (初中英语单词)
• leisure [´leʒə] n.空闲；悠闲；安定 (高中英语单词)
• liable [´laiəbəl] a.易于...的；有责任的 (高中英语单词)
• taking [´teikiŋ] a.迷人的 n.捕获物 (英语六级单词)