430. go to any length想一切办法, 尽一切力量

429. at length (=after a long time, at last)终于 at length (=in detail, thoroughly)详细地

428. lend itself/themselves to适合于(某用途)

427. at one’s leisure 在…有空的时候

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

425. at least 至少; at most 至多

424. lean against (背)靠着…

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

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

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