含铜量小于0.5%的含铜污泥的翻译：Copper content less than 0.5% of copper-containing sludge 什么意思？中文翻译英文，英文翻译中文，怎么说？

青云英语翻译

Copper content is less than 0.5% copper sludge

Copper content less than 0.5% of copper-containing sludge

The copper content is smaller than 0.5% contains the copper sludge

cupric Amount is less than 0.5 % of copper sludge

Copper content less than 0.5% of copper-containing sludge