n. 1.循环，周期，一转。 2.周时，周年，年纪。 3.(诗、故事等的)始末。 4.自行车，三轮车，摩托车。 5.【电学】周波；【数学】环；【拓】闭链；【地质学；地理学】旋徊；【植物；植物学】(从枯凋到再生的)一轮迥；天体运转的轨道。 短语和例子 the business cycle 商业盛衰的周期性。 the life cycle 【生物学】生命周期，生活史。 the Arthurian cycle 《亚瑟王记》。 the Calippic cycle 七十六年周期。 the Trojan cycle 《特洛伊战争史诗集》。 vi. 1.轮转，循环。 2.骑自行车[三轮车等]。 vt. 使循环，使轮转。 -ry (出售或修理自行车的)自行车铺。
a wheeled vehicle that has two wheels and is moved by foot pedals 同义词：bicycle, bike, wheel,
a single complete execution of a periodically repeated phenomenon; "a year constitutes a cycle of the seasons" 同义词：oscillation,
a periodically repeated sequence of events; "a cycle of reprisal and retaliation"
a series of poems or songs on the same theme; "Schubert''s song cycles"
the unit of frequency; one hertz has a periodic interval of one second 同义词：hertz, Hz, cycle per second, cycles/second, cps,
an interval during which a recurring sequence of events occurs; "the never-ending cycle of the seasons" 同义词：rhythm, round,
recur in repeating sequences
ride a bicycle 同义词：bicycle, bike, pedal, wheel,
ride a motorcycle 同义词：motorbike, motorcycle,
pass through a cycle; "This machine automatically cycles"
cause to go through a recurring sequence; "cycle the laundry in this washing program"
例句与用法
1.
A cow's estrus cycle averages 21 days . 母牛的发情周期平均为21天。
2.
The trough is the lowest level of the cycle . 谷底是整个周期的最低点。
3.
Main memory cycle time has bottomed out . 主存贮器的周期已趋饱和。
4.
He steered his cycle into archway road . 他骑自行车来到阿奇维路。
5.
The life cycle is summarized in table 16 . 其生命周期摘要见表16。
6.
Find the expected life of the part in cycles . 求零件的预期寿命的循环数。
7.
A tree is a connected graph with no cycles . 一个树是一个没有圈的连通图。
8.
Every business cycle is unique . 每次商业周期各有自己的特点。
9.
Their productive cycle covers several decades . 它们的生产周期可延续几十年。
10.
The life cycle of neurospora is shown in fig1. 1 . 图11概括了链孢霉的生活史。
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