Definition
周期 (zhōu qī) refers to a period that repeats in a cycle (e.g., a rotation or menstrual cycle). It differs from 时期 (shí qī), which is a general time period or phase without the implication of recurrence. 循环 (xún huán) is the verb 'to cycle' and is not a noun.
noun
periodcycle
Examples
- 周期。Dìqiú zhuǎndòng de zhōu qī shì yì nián.The Earth's rotation cycle is one year.
- 周期28。Nǚxìng de shēnglǐ zhōu qī dàyuē shì èrshíbā tiān.A woman's menstrual cycle is about 28 days.
- 周期。Zhège jīqì de wéixiū zhōu qī shì sān gè yuè.The maintenance cycle of this machine is three months.
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