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。
501. rudimentary
502. scale
503. schedule
504. scheme
505. section
506. secure
507. sediment
508. seek
509. sensitive
510. shift
511. shortage
512. significant
513. simulate
514. solar
515. soluble
516. sophisticate
517. spectacular
518. stable
519. starve
520. steady
521. stimulate
522. strength
523. stress
524. strike
525. structure
526. subsequent
527. substitute
528. succession
529. successive
530. summary
531. suppress
532. survive
533. sustain
534. symbiotic
535. technical
536. tendency
537. terminal
538. territory
539. trace
540. transfer
541. transform
542. transit
543. transmit
544. transplant
545. transport
546. trend
547. trigger
548. ultimately
549. undergo
550. underscore
551. uniform
552. unique
553. urban
554. utilize
555. vacation
556. valid
557. valuable
558. various
559. vast
560. verbal
561. versatile
562. via
563. vigorous
564. violate
565. visible
566. vision
567. vital
568. vocation
569. widespread
570. youngster
