back flow的用法和樣例：
例句
- The water seems to retrograde back into the ocean low tide.
這海水好像在低潮時會倒逆流回大海。 - The water seems to retrograde back into the ocean low tide.
這海水好像在低潮時會倒逆流回大海。 - We will wire back the funds if no one collects it.
如果沒人來募集，我們會讓它迴流向基金。 - This backwash current is governed by volume of water and flow.
迴流的水流是由水量及流動決定的。
