| 21. | making the completion of a full cycle |
| 转一整圈
|
| 22. | the life cycle of the butterfly |
| 蝴蝶的生活周期
|
| 23. | wearing protective headgear on a motor cycle |
| 骑摩托车时戴保护头盔
|
| 24. | the cycle of the seasons |
| 四季的循环
|
| 25. | the cycle of economic booms and slumps |
| 经济繁荣和经济萧条的周期变化
|
| 26. | a Schubert song cycle |
| 舒伯特的组歌
|
| 27. | an auto cycle race |
| 摩托车赛
|
| 28. | ride double on an auto cycle |
| 两人合骑一辆助动车
|
| 29. | complete the cycle of changes |
| 完成变化的周期
|
| 30. | the Arthurian cycle |
| 一套亚瑟王和他的武士们事迹的故事
|