acid-insoluble residue

例句：

1. 1. The chemical analysis showed that the sample contained a significant amount of acid-insoluble residue.
   化学分析显示，样本中含有大量的酸不溶残渣。
2. 2.Due to the high acid content in the wastewater, it is important to remove acid-insoluble residues before discharging into the environment.
   由于废水中酸性物质含量高，在排放到环境中之前，必须去除酸不溶残渣。
3. 3. In order to prevent environmental pollution, it is necessary to control the production process and reduce theacid-insoluble residue in the final product.
   为了预防环境污染，有必要控制生产过程并减少最终产品中的酸不溶残渣。