451. guard against防止;提防
452. adverse effect不利影响;副作用
453. get used to 习惯于...
454. refrain from克制;抑制;忍住
455. holdup 阻挡;拦截
456. from bad to worse每况愈下;越来越精
457. count in把...计算在内
458. tend to趋向;易于;有.的倾向
459. from cover to cover从头至尾
460. touch on提及;谈及
461. count on指望
462. health hazard 健康危害
463. be subject to 受...支配，受限于...
464. pay attention to注意，重视
465. be contrary to违背，与...相反
466. artificial intelligence人工智能
467. be applied in 应用于…
468. become/be concerned about 关心，担忧
469. hinge on完全取决于
470. manage with 用...设法应付
471. deliver to送交,交付
472. in broad daylight光天化日之下，公开地
473. in terms of 就...而言
474. appeal to对...有吸引力
475. sort out分类，整理
476. figure out 想出
477. devote….to把…用于
478. major in 主修
479. secondary education中等教育
480. executive board执行委员会，董事会
481. happen to 刚好
482. confine sb to把某人限定在范围内
483. take up 占用
484. botanical garden植物园
485. be accustomed to习惯于
486. be accused of因…被起诉/指责
487. be less likely to不太可能
488. resort to 依靠，诉诸
489. be obliged to 应该
490. be based on基于
491. put up with 忍受，容忍
492. specialize in专门研究
493. in time 及时地
494. make peace讲和，言归于好
495. out of control失控 call for 要求，提倡
496. take it for granted认为其理所当然
497. be crazy about着迷于，热衷于
498. be alien to与...相异，与...格格不入
499. broaden one's horizons开阔某人的视野
500. a sheer waste of time纯粹浪费时间
501. slip into陷入，堕入
502. have expertise in有…的专业知识
503. convert…into把…转化成...
504. regard… as 把...看作…
505. put effort into把精力花费在...
506. make use of 利用
507. sign up 报名参加
508. be qualified to能胜任…
509. buy out 出钱使…放弃地位
510. in desperate need of 迫切需要
511. be mean to对…刻薄
512. derive from 得自
513. teach sb. a lesson教训某人一顿
514. pull…out of让...从…中退出
515. embark on从事，开始(做某事)
516. turn away from避开，脱离
517. brush aside对...置之不理
518. dry out完全变干，干透
519. in case免得，以防
520. be admitted to加入获准做某事
521. lay the foundation of打下…的基础;奠定了…的基础
522. be concerned about 关心，担忧，挂念
523. rely on 依靠，依赖
524. take away带走，拿走
525. be suspected of被怀疑(做...)
526. on behalf of作为…的代表;为了…的利益
527. be irritated with 被激怒
528. thrive on因…繁荣发展
529. place a strain on使...(极度)紧张，造成压力
530. pose a threat to 对造…成威胁
