natural flow的用法和樣例：
例句
- Openings in the glass facade and the ventilation shutters in the roof create a healthy natural flow and exchange of air.
開口玻璃幕牆及通風百葉窗在屋頂創造一個健康的自然流動和交換的空氣。 - When water tumbles down a mountainside, this natural agitation fills the water with oxygen, charging it with electrons.
水從山上流下來的時候，自然流動會使得它充滿氧氣和電子。
