n.[C]

1. 周期；循环；一转
   The seasons of the year make a cycle.

   一年四季构成一个循环。

2. 整个系列；整个过程
   He studied the cycle of events leading to the Great Depression.

   他研究了导致大萧条的一系列事件。

3. （表现同一主题等的）一组小说（或戏剧，诗歌等）
4. 一段长时期，时代
5. 脚踏车；摩托车
   She goes to work on her cycle.

   她骑脚踏车上班。

6. 【无】周（波）
7. 天体运行的轨道

vi.

1. 循环，轮转
   The machine cycles automatically.

   这台机器自动循环运转。

2. 骑脚踏车（或摩托车）
   I cycled to the beach.

   我骑车去海滩。

vt.

1. 使循环，使轮转

n.

1. a series of events that are regularly repeated in the same order.
   ▸the period of time taken to complete a single such series.
2. one complete sequence of changes associated with a recurring phenomenon such as an alternating current, wave, etc.
   ▸Physics  a cycle per second; one hertz.
   ▸Ecology  the movement of a simple substance through the soil, rocks, water, atmosphere, and living organisms of the earth:

   the carbon cycle.
3. a series of musical or literary works composed around a particular theme.
4. a bicycle.
   ▸a ride on a bicycle:

   a 112-mile cycle.

v.

1. ride a bicycle.
2. move in or follow a cycle of events.