611. on sale (=offered to be sold) 出售,&n bsp;上市
612. be satisfied with 满意
613. on a large scale 大规模地
614. on schedule(=at the planned or exacted&n bsp;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
615. be schedule for 定在某时(进行)
616. scrape through(in) 勉强通过
617. from scratch(=from the beginning)从头开始
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& nbsp;of 为追求..;in behalf of为…的利益;in favor of 为赞成…;i n support of 为支持…
619. in season 旺季
620. in secret 秘密地; in private 私下