英语语法分析

Struvite stones that form in the presence of infection contain layers of bacterial colonies.

在感染存在下形成的鸟粪石结石含有细菌菌落层。

The struvite can be made as the controlled release fertilizer, which has good economic benefit.

作为缓释肥，具有良好的经济效益。

The phosphorus can be recoved in the form of hydroxyapatite or struvite, and the products recovered are suitable for reuse.

该法能够以羟基磷酸钙或鸟粪石的形式回收磷，回收产物适合再次利用。