probiotic bacteria的用法和样例：
例句
- Amazingly, these mitochondria were once free-living bacteria that were captured by an early single-celled eukaryote.
令人惊奇的是，这些线粒体曾是被早期单细胞真核生物俘获的自生细菌。 - Foods like yogurt and fermented foods naturally contain bacteria called probiotics.
像酸奶和发酵食品之类，自然含有所谓的益生菌。 - And there are "prebiotics," too, which contain fiber and other nutrients that feed probiotic bacteria.
然而这些包含了纤维和其它营养品的原生物同时也为益生菌提供了食物的来源。
