其物化性能有显著改进，脱杂质活性和稳定性明显提高。
Physicochemical properties of the new catalysts were greatly improved, and the impurity removal activity and the stability enhanced.
这意味着活性炭过滤器会去除某些杂质同时忽视其他物质。
This means that an activated-charcoal filter will remove certain impurities while ignoring others.
金属催化剂是高活性的，但一旦它们发生了反应就很难分离出去，留下微小的杂质可能影响芯片的性能。
Metallic catalysts are highly active, but they're difficult to remove once the reaction is done, leaving small impurities that can nonetheless interfere with a chip's performance.
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