1. at an aquarium    在水族馆

2. at the beginning of ... 在……的开始

    in the beginning   开始，起初

3. It was a time when... 有一段时间……

   It was a time when I hated to go to school.

4. at the time   当时

5. witness   证人（n.) ;亲眼目睹(v)

    I witnessed the accident= I was a witness to the accident.

6. sort out 分类，整理；解决困难

7. in time to do sth 及时做某事

He got to the station in time to catch the train.

8. call out   大声叫出，喊出

　call in 召集，召入

　call on   拜访（某人）；号召

　call off 取消

　call at 　拜访某地

　call up   打电话给某人；回忆起

９. ahead of   在……之前，在……前面　　ahead of time 提前

10. lead to 通向（……的路）；导致　（后面直接加名词）

　lead sb to do sth 导致某人做某事

11. in the distance 在远处　　　at a distance of ...　隔……有多远

12. a pack of   一群

13. aim at 瞄准，对准

14. within a moment or two 片刻之后

15. in the meantime (=meanwhile/at the same time) 同时

16. have a good feed 饱餐一顿，吃得好

      feed on 以……为食

16. be terrified of doing sth 害怕做……

17. hold up 支撑，举起；延迟，阻碍

     We were held up on the way.

18. in pairs   成双成对地

19. help out   帮助……摆脱困境

20. reflect on/upon   认真思考，沉思

21. became/be aware of/that...   意识到

22. narrow sth to ...   把……局限在……

      a narrow escape   堪堪躲过

23. upside down   上下翻转的，颠倒的

24. be scared/frightened to death 被吓得要死

25. bury oneself in /be buried in doing sth   忙于做某事