英语语法分析

So does that mean methanogenic life exists?

那么那就意味着甲烷生物存在吗？

Cells of the amoeboid stage lacked the methanogenic endosymbionts.

变形虫阶段的细胞仍不含内共生菌。

The granular sludges had high methanogenic activity and good settleability.

颗粒污泥活性高、沉降性能好。