441. before long 不久, 过了不久以后.
442. in the long run 从长远来说,最后; in the short term
443. 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 不惜一切. 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 好转, 在康复中
449. mention sth. to sb. 向某人提起某事
450. at the mercy 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…in mind牢记
453. bringto mind使回想起
454. by mistake错误地
455. at the moment 此刻,现在 for the moment 暂时 just a moment 稍等片刻 at the last moment 在最后一刻
456. in the mood for 有情绪去做..,有心境做.
457. no more…than 和…一样都不…
458. for the most part 多半,大多数,一般来说
459. at most 最多, 至多
460. make the most of 充分利用
461. be not much of不是很好的… be something of 有点…,像…
462. name after 用…的名字命名
463. native to 所产的
464. by nature 天生的, 生来
465. in mature 本质上
466. in the nature of 属…性质
467. none other that 不是别人,正是…
468. above normal 高于正常
469. for nothing 免费
470. nothing but 只有, 不过…而已
471. to say nothing of更不用说…
472. do sth. at short notice 只给很少时间准备
473. until further notice 在另行通知前
474. take notice of 注意
475. object to 反对
476. objection to 反对
477. on occasion不时地,必要时
478. by occasion of 由于
479. occupy oneself with 忙于
480. it occurs to sb. that… 某人想到…