cycle

cycle
noun

[often with adj. or noun modifier]a series of events that are regularly repeated in the same order
循环
the boom and slump periods of a trade cycle.
贸易盛衰循环。
■the period of time taken to complete a single sequence of such events
周期
the cells are shed over a cycle of twenty-eight days.
细胞脱落周期为28天。
■(technical)a recurring series of successive operations or states, such as in the working of an internal-combustion engine, or in the alternation of an electric current or a wave
(技)循环；周；工作循环
the familiar four cycles of intake, combustion, ignition, and exhaust.
常见的四冲程：吸入、燃烧、点火和排气。
■(Biology)a recurring series of events or metabolic processes in the lifetime of a plant or animal
(生)（动植物生活或代谢的）周期
the storks' breeding cycle.
鹳的繁殖周期`。
■(Biochemistry)a series of successive metabolic reactions in which one of the products is regenerated and reused
(生化)（代谢）循环，周期
■(Ecology)the movement of a simple substance through the soil, rocks, water, atmosphere, and living organisms of the earth
(生态)（简单物质通过地球上土壤、岩石、水、大气和生物的运动）循环。见 carbon cycle, nitrogen cycle
■(Computing)a single set of hardware operations, especially that by which memory is accessed and an item is transferred to or from it, to the point at which the memory may be accessed again
(计算机)周期，循环
■(Physics)a cycle per second; one hertz
(物理)周，周／秒，赫（兹）
a complete set or series
整套，系列
the painting is one of a cycle of seven.
这是一套七幅中的一幅画。
■a series of songs, stories, plays, or poems composed around a particular theme, and usually intended to be performed or read in sequence
组歌，组剧，组诗
Wagner's Ring Cycle.
瓦格纳组歌。
a bicycle or tricycle
自行车，三轮车
■[in sing.]a ride on a bicycle
自行车骑行
a 112-mile cycle.
112英里的自行车旅行。

verb

[no obj., with adverbial of direction]ride a bicycle
骑自行车
she cycled to work every day.
她每天骑车上班。
[no obj.]move in or follow a regularly repeated sequence of events
循环
economies cycle regularly between boom and slump.
经济总是在繁荣与衰退之间定期循环。

语源

late Middle English: from Old French, from late Latin cyclus, from Greek kuklos 'circle'

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