natural circulation

• 自然循环

natural circulation的用法和样例：

例句

1. Human biological rhythms are related to the natural cycle of day and night.
   人的生物节奏与昼夜的自然循环有关。
2. In one sense, it was a natural, recurring event, but it was also a phenomenal glimpse at the power and glory of God.
   从一方面来说，这是自然循环的现象，但这令人叹为观止的一幕，也能让我们瞥见上帝的权能和荣耀。