作为英语学习的过来人，我们能深刻感受到同学们背单词的痛苦，为了帮助千千万万考生摆脱词汇记忆的痛苦，我们精心挑选出来了 570 个高频核心词汇，并且在这 570 个单词的基础之上，通过听、说、读、写四个方面进行扩展，全面掌握核心词汇，轻松搞定托福。
401. normal
402. notable
403. nourish
404. novelty
405. numerous
406. nutrient
407. obtain
408. obviously
409. occupy
410. occur
411. odd
412. offset
413. option
414. organism
415. orient
416. output
417. overlap
418. overseas
419. parasite
420. participate
421. particle
422. passionate
423. passive
424. patient
425. perceive
426. permanent
427. persist
428. perspective
429. phenomenon
430. philosophy
431. physical
432. portion
433. positive
434. potential
435. precious
436. precipitate
437. precise
438. precursor
439. predator
440. predict
441. predominant
442. pregnant
443. preliminary
444. presence
445. pressure
446. prevalent
447. previous
448. primarily
449. principal
450. principle
451. prior
452. proceed
453. professional
454. profitable
455. profound
456. prohibit
457. project
458. promise
459. promote
460. proponent
461. proportion
462. propulsion
463. prospect
464. prosperous
465. psychology
466. purchase
467. quality
468. quantity
469. random
470. range
471. rapid
472. rational
473. react
474. recall
475. reconstruct
476. recycle
477. refine
478. region
479. registration
480. reinforce
481. relax
482. reliable
483. religion
484. reluctant
485. remarkable
486. remote
487. require
488. reserve
489. resident
490. resistant
491. restrict
492. resolve
493. retain
494. reveal
495. revenue
496. reverse
497. revise
498. revolution
499. rigid
500. route
