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If the carbon were bacterial then it ought to be everywhere .

如果那些碳元素是细菌的，应该在所有区域都出现。

In 1982 scientists showed that a bacterial infection was the main culprit .

但1982年科学家们发现，某种细菌的感染才是罪魁祸首。

That rotation distributes the bacterial food throughout the slurry and also removes excess carbon dioxide .

这种旋转分散了遍布悬浮液细菌的事物并且挤出了多余的二氧化碳。

This arrangement implies a bacterial social structure where individuals help the group as a whole .

这样的组合体现了细菌的社会结构，在这里个体担负着保卫全体成员的使命。

For example , bacterial treatments may help with the mental symptoms of illnesses such as irritable-bowel syndrome .

例如，细菌的治疗方法可能有助于改善诸如肠易激综合症疾病的精神症状。