500. in particular (=especially) 特别是,尤其

499. (be) particular about 讲究,挑剔(吃,穿)

498. participate in (=take part in)参加

497. part with (=give up, sell) 舍弃,卖掉

496. go to great pains=take pains 下功夫,努力

495. keep pace with 跟…齐步前进

494. of one’s own某人自己的

493. on one’s own (=along, without help)单独

492. owe…to 把…归于…

491. on the outskirts (of) 在城郊