週期:zau1 kei4,周期:zau1 kei4
(pos:名詞)
<explanation>
yue:回復返去原本狀態嘅時間（量詞：個）
eng:cycle; period (of time)
<eg>
yue:經濟週期 (ging1 zai3 zau1 kei4)
eng:economic cycle
<eg>
yue:公轉週期 (gung1 zyun3 zau1 kei4)
eng:orbital cycle
<eg>
yue:月經週期 (jyut6 ging1 zau1 kei4)
eng:menstrual cycle
