英语语法分析

At this point, the bacteria on the nitrocellulose paper remain invisible.

此时，硝化棉纤维纸上的细菌仍旧不可见。

The nitrocellulose and water slurry was transferred to a centrifuge.

把硝化棉和水的浆液转移到离心机中。

Biodegradability of the nitrocellulose with diphenylamine was investigated in this paper.

研究了含二苯胺硝化棉的生物降解特性。