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424. sentiment n. 感情 425. severe a. 严重的 ~ wound 426. shield v. 保护 427. simultaneously a. 同时地 428. sole a. 唯一的 429. sponsor n. 赞助者 430. startle v. 惊吓 431. stray v. 走失 432. substantial a. 可观的，大量的=considerable a substantial income 433. sufficient a. 充分的 434. supplement v./n. 补充 He ~ed his income by taking a part-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 dancers 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 | 
