621. senior to 比…年长; junior to 比…轻; superior to 比…更好; inferior to 比…差

620. in secret 秘密地; in private 私下

619. in season 旺季

618. in search of 寻找;in honor of 为了...表示敬意;in memory of 为纪念..;in hopes of为期待..;in pursuit of 为追求..;in behalf of为…的利益;in favor of 为赞成…;in support of 为支持…

617. from scratch(=from the beginning)从头开始

616. scrape through(in) 勉强通过

615. be schedule for 定在某时(进行)

614. on schedule(=at the planned or exacted time)按时,准时;ahead of schedule提前; in advance预先;behind schedule落后于计划进度,晚于规定时间

613. on a large scale 大规模地

612. be satisfied with 满意