401. instead of (=in place of) 代替，而不是…
402. instruct…in (=teach) 教.指導.訓練某人…
403. insure…for 把…保險(多少錢); ensure 使安全; assure…(of) 使…確信,保證
404. insure…against 保險…以防
405. intend…for 打算把…給
406. (be) intent on 專心致志, 堅決
407. in the interests of 符合…的利益be interested in 對…感興趣
408. interfere in 干涉, interfere with 打攪,干擾
409. at intervals 每隔一會兒, 每隔一段距離
410. intervene in 干預
411. invest in 投資
412. be involved in (=become connected or concerned) 捲入, 參加
413. by itself (=alone, without help)單獨地,靠自己
414. in itself 本身; of itself 自發,自然
415. be jealous of 妒忌
416. jump at (=to be eager to accept)搶著接受,
417. jump on (=scold, tell of) 叱責
418. junior to sb. 年紀較…輕, 職位較…低.
419. (be) keen on 喜愛, 渴望
420. keep a close watch on ( =keep a sharp lookout for) 密切注視
421. keep…to oneself(=keep secret)不告訴別人
422. to(the best of) one’s knowledge 據…所知
423. at large(=at liberty, free) 在逃, 逍遙法外at large(=in general) 一般來說, 大體上
at large(=at full length; with details)詳細地
424. lean against (背)靠著…
425. at least 至少; at most 至多
426. (not) in the least 一點(也不), 絲毫(也不)
427. at one’s leisure 在…有空的時候
428. lend itself/themselves to 適合於(某用途)
429. at length (=after a long time, at last)終於at length (=in detail, thoroughly)詳細地
430. go to any length 想一切辦法, 盡一切力量
431. be liable to (=be subject to)易於..的`,應受(罰)
432. be liable for 對…應負責任的
433. lie in 在於
434. in life 一生中
435. for life 終身
436. in the light of (=considering; taking into account) 考慮到, 根據
437. throw light on ( = make clear, explain) 使…更為清楚, 提供線索, 闡明
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,很長時間(否定句.疑問句中)
441. before long (=soon)不久, 過了不久以後.
442. in the long run (=in the end)從長遠來說,最後; in the short term (從短期來說)
443. (be) at a loss 不知所措
r in 主修(某課程)
445. as a matter of fact 實際上, 事實是
446. by all means(=at all costs)不惜一切=certainly 當然行by means of 用…by no means 完全不
447. on memory of 為紀念…
448. on the mend (=in the process of recovering) 好轉, 在康復中
449. mention sth. to sb. 向某人提起某事
450. at the mercy of (=in the power of) 任…擺佈, 在…支配下
451. be in a mess 亂七八糟, 處境困難make a mess of 弄亂, 打亂
452. bear(or keep)…in mind(=remember)牢記
453. bring(or call)to mind(=remember)使回想起
454. by mistake(由於粗心,健忘原因而)錯誤地
455. at the moment (=now) 此刻,現在for the moment (=for the time being)暫時
just a moment 稍等片刻at the last moment 在最後一刻
456. in the mood for 有情緒去做..,有心境做.
457. no more…than 和…一樣都不…
458. for the most part 多半,大多數,一般來說
459. at (the) most 最多, 至多
460. make the most of 充分利用
461. be not much of(=not a good)不是很好的…be something of 有點…,像…
462. name after 用…的名字命名
463. native to 所產的
464. by nature 天生的, 生來
465. in nature 本質上
466. (be) in the nature of 屬…性質
467. none other that 不是別人,正是…
468. above normal 高於正常(溫度)
469. for nothing (=free, without payment)免費
470. nothing but 只有, 不過…而已
471. to say nothing of(=not to mention)更不用說…
472. do sth. at short notice 只給很少時間準備
473. until further notice 在另行通知前
474. take notice of (=pay attention) 注意
475. object to (=be opposed to) 反對
476. objection to (接動名詞) 反對
477. on occasion(=now and then)不時地,必要時
478. by occasion of (=because of) 由於
479. occupy oneself with (in) 忙於(某事)
480. it occurs to sb. that… 某人想到…
481. once and for all =once and forever 永遠地all at once (=suddenly, now) 立即,馬上
once in a while (=occasionally) 偶爾(just) for once 就這一次
482. (all) by oneself 獨自(沒有別人幫助)
483. operate on sb. 給某人做手術operation n. come/ go into operation 開始運轉
put/bring sth. into operation 使…投產,運轉
484. be of the opinion 持有…的看法
485. in one’s opinion 按某人的看法
486. be opposed to… 反對…
487. be opposite to 與…相反的
488. (be) in order(=acceptable)合適的,恰當的
in order 井井有條,處於良好狀態; out of order(=in bad condition)出毛病,發生故障
489. made to order 定做的(衣服)
490. originate in/from(=begin)起源於,由..引起
491. on the outskirts (of) 在城郊
492. owe…to 把…歸於…
493. on one’s own (=along, without help)單獨
494. of one’s own 某人自己的
495. keep pace with 跟…齊步前進
496. go to great pains=take pains 下功夫,努力
497. part with (=give up, sell) 捨棄,賣掉
498. participate in (=take part in)參加
499. (be) particular about 講究,挑剔(吃,穿)
500. in particular (=especially) 特別是,尤其