countercurrent extraction的用法和樣例：
例句
- Black tea extracts are normally produced by a hot or boiling water extraction process, usually a countercurrent process.
紅茶的提取物通常是用熱水或沸水通過逆流萃取工藝來製取的。 - Adesign calculation method has been proposed for the counterflow extraction process of partially miscible ternary systems.
針對部分互溶三元系逆流萃取過程提出了一種設計型精確計算方法。
