周期 zhōuqī period
period; cycle
怎么记住“周期”: 周 week + 期 a period of time = period.
汉字
用法
- A recurring cycle or period - 生命周期 (shēngmìng zhōuqī) life cycle, 经济周期 economic cycle.
- Scientific/technical: a repeating interval. Contrast 时期 (shíqī), which is a one-off era or phase, not a repeating loop.