401. on one's guard 警惕,提防

402. on one's own 獨(dú)立,獨(dú)自

403. on purpose 故意地

404. on sale 出售,廉價(jià)出售

405. on schedule 按時(shí)間表,準(zhǔn)時(shí)

406. on second thoughts 經(jīng)重新考慮

407. on the contrary 正相反

408. on the grounds of 根據(jù),以...為由

409. on the other hand 另一方面

410. on the point of 即將...的時(shí)刻

411. on the road 在旅途中

412. on the side 作為兼職/副 業(yè)

413. on the spot 在場(chǎng);馬上

414. on the whole 總的來(lái)說(shuō),大體上

415. on time 準(zhǔn)時(shí)

416. on(an/the) average 平均,通常

417. once (and) for all 一勞永逸地

418. once again 再一次

419. once in a while 偶爾

420. once more 再一次

421. once upon a time 從前

422. one another 相互

423. one's cup of tea喜歡的人/物

424. open to不限制,開(kāi)放的

425. opposite to在對(duì)面

426. or else 否則,要不然

427. or so 大約,左右

428. other than 非;除了

429. out of breath 喘不過(guò)氣來(lái)

430. out of control 失去控制

431. out of date 過(guò)時(shí)的

432. out of doors 在戶(hù)外

433. out of order 出故障的

434. out of place 不適當(dāng)?shù)?/p>

435. out of practice 久不練習(xí),荒疏

436. out of sight 看不見(jiàn),在視野外

437. out of the question 毫無(wú)可能的

438. out of touch 不聯(lián)系,不接觸

439. out of 從...中;由于;缺乏

440. over and over (again) 一再地,再三地

441. parallel to與...平等,類(lèi)似

442. particular about挑剔,講究

443. patient with有耐心

444. peculiar to獨(dú)特的,獨(dú)有的

445. pick up撿

446. play by ear見(jiàn)機(jī)行事

447. popular with受...喜愛(ài),愛(ài)戴

448. prior to 在...之前

449. pull one's leg拿某人開(kāi)玩笑put someone on

450. put someone up給某人提供住宿

451. put up with忍受

452. quite a few 相當(dāng)多,不少

453. rain cats and dogs瓢潑大雨

454. rather than 不是...(而是)

455. reach agreement 達(dá)成協(xié)議

456. reach an agreement達(dá)成一致

457. regardless of 不顧,不惜

458. relative to與...有關(guān)

459. remove from 從…除去

460. representative of代表...的

461. resign one's post 辭職

462. responsible for負(fù)責(zé),是...原因

463. result from 由于

464. rich in富于

465. right away 立即,馬上

466. ring sb. up 打電話(huà)給…

467. rule out 排除…的可能性

468. run out of 用完

469. rush hours 上下班高峰

470. see: see to it that - make sure that 確保

471. sensible of 覺(jué)查到

472. sensitive to 對(duì)...敏感

473. set another date 改期

474. set one's mind on doing 決定

475. short of 缺少

476. show off 賣(mài)弄

477. sick of 厭惡,厭倦

478. side by side 肩并肩,一起

479. similar to 相似

480. skilled at /in 善于

481. slip one's mind 忘記

482. so far 迄今為止

483. somewhere around 大約

484. sooner or later 遲早,早晚

485. sore throat / foot 嗓子啞/腿酸

486. stay up late 熬夜

487. step by step 逐步地

488. subject to 受制于,易于

489. such as 例如,諸如

490. sufficient for 足夠的

491. suitable for/to 適合于

492. superior to 優(yōu)于,級(jí)別高于

493. sure of /about 對(duì)...有信心,確信

494. suspicious of 懷疑

495. take a leave 請(qǐng)假

496. take a seat / be seated

497. take one's place 取代

498. take one's time 慢慢來(lái)

499. take sth. seriously 認(rèn)真對(duì)待

500. take up 占據(jù)