pressure flow的用法和樣例：
例句
- 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。 - Through retrograde flow, the dorsal branches also supply all of the proximal pole.
通過血液迴流，背側的血管可以為整個舟骨的近極供血。 - The Pacific tilting disc check valve uses gravity to rapidly close the disc upon reversal of flow.
美國太平洋翻轉式閥瓣止回閥在出現逆流時利用重力迅速關閉閥瓣。
