theart.那；这；这些；那些adv.（用于比较级前）更加；用于最高级前；(用于形容词、副词比较级前)越 ... 越 ...the aforesaid前面提到的人; 上述的人

1. The sodium is removed with cation exchange resin.
   钠用阳离子交换树脂来分离。
2. A new method for the determination of trace iron by ion exchange resin phase spectrophotometry was developed.
   提出了利用离子交换树脂相分光光度法测定痕量铁的方法。