raw metal additions

例句：

1. 1. The engineeradded a new raw material to the mixto improve its strength.
   工程师在混合物中加入了一种新的原材料以增强其强度。
2. 2. The companyis adding raw material additions to theirproducts to meet environmental standards.
   该公司正在其产品中添加原材料添加物以满足环保标准。
3. 3.The manufacturer claims that their raw material additions are of high quality and safe forhuman consumption.
   制造商声称他们的原材料添加物质量高且对人类安全无害。