459. remove from 从…除去
460. representative of代表...的
481. slip one's mind 忘记
482. so far 迄今为止
483. somewhere around 大约
484. sooner or later 迟早,早晚
485. sore throat / foot
嗓子哑/腿酸
486. stay up late 熬夜
487. step by step 逐步地
488. subject to受制于,易于
489. such as 例如,诸如
490. sufficient for足够的
491. suitable for/to适合于
492. superior to优于,级别高于
493. sure of /about对...有信心,确信
494. suspicious of怀疑
495. take a leave请假
496. take a seat / be seated
497. take one's place 取代
498. take one's time慢慢来
499. take sth. seriously 认真对待