431. stray v. 走失
432. substantial a. 可观的，大量的=considerable> asubstantial income
433. sufficient a. 充分的
434. supplement v./n. 补充>He ~ed his income by taking apart-time job.
435. testify v. 作证
436. trigger v. 引发 ~ a debate/war
437. swing v. 摇摆
438. universal a. 普遍的
439. utilize v. 利用
440. variation n. 变动> the ~ in temperature
441. virtually ad. 实际上
442. wretched a. 难过的
443. flexible a. 灵活的 The dancer’s body is very ~.
444. facet n. 侧面 a ~ of American life
445. endeavor v. /n. 努力
446. elaborate a. 精心的
447. crude a. 未加工的 ~ oil
448. preach v. 说教
449. strive v. 力求 ~ for freedom
450. punctual a. 守时的>He is a ~ man.
451. harness v. 治理 ~ a river
452. integrity n. 诚实;完整
453. submit to v. 屈服=yield to
454. launch v. 发起
455. striking a. 显著的
456. instinct n. 本能
457. maintenance n. 保养
458. scrape v. 刮,擦
459. sensible a. 合情理的
460. eliminate v. 去除
461. propel v. 推动
462. pledge n. 保证
463. label n. 标签
464. justify v. 使…有正当理由
465. initiate v. 创始
466. stereotype n. 陈规，固定的看法
467. identify…with v. 使等同
468. convey v. 传达
469. collapse v. 坍塌
470. affection n. 喜爱
471. yield v. 结出
472. promising a. 有希望的
473. publicity n. 公众的注意
474. hazard n. 危险
475. forge v. 伪造 ~ a famous painter’s signature
476. concession n. 让步
477. submerge v. 淹没
478. imperative a. 必要的
479. elapse v. 逝去
480. confine v. 限制
481. thrive v. 繁荣=prosper
482. resort to v. 诉诸于
483. sustain v. 维持=support
484. highlight v. 使突出 n. 最精彩的部分
485. massive a. 大量的; 大而重的
486. mask v. 掩饰
487. restore v. 恢复
488. restraint n. 约束
489. scope n. 范围
490. seemingly ad. 表面上
491. speculate v. 猜测
492. steep a. 陡的
493. summon v. 唤起 How can I ~ up his courage?
494. shift v. 移动;转变 ~ responsibility on to others
495. transient a. 短暂的
496. prompt a. 迅速的
497. impart v. 传授
498. embody v. 体现
499. confront v. 面对
500. triumph n. 胜利
