prereduction purification

例句：

1. 1. The process of prereduction purification is crucial for the efficiency of the subsequent chemical reaction.
   预减纯化过程对于后续化学反应的效率至关重要。
2. 2.During the prereduction purification stage, the sample needs to be carefully handled to prevent contamination.
   在预减纯化阶段，需要小心处理样品以防止污染。
3. 3. The prereduction purification step is essential in ensuring that the final product meets industrial standards.
   预减纯化步骤是确保最终产品达到工业标准的关键。