最近德国微生物学家发现在酵母细胞内小的活动细菌（孢内共生物）。
More recently a German microbiologist discovered small mobile bacteria inside the yeast cells (endosymbionts).
昆虫的消化道内共生有各种细菌，它们赋予宿主昆虫各种各样的生物学功能。
Multiple symbionts were lived in alimentary tract of insect, which endow their insect host multiple biological functions.
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