translation.en: We started using probiotic bacteria which are safe bacteria that have a health benefit, and found that when orally delivered to mice, these probiotics would selectively grow inside of liver tumors.
translation.zh: 我们开始使用益生菌， 它们安全并且对健康有益， 随后发现，当老鼠口服益生菌时， 这些益生菌会选择 生长在肝脏的肿瘤里。