Question: Along with streptococcus thermophilus, what other bacteria is used to make Bulgarian yogurt?
Answer: 保加利亚乳杆菌, 保加利亚乳杆菌, L.d.保加利亚菌, 德氏乳杆菌亚种保加利亚菌, 德氏乳杆菌保加利亚亚种, Lactobacillus bulgaricus, L. bulgaricus, L. d. bulgaricus, Lactobacillus delbrueckii subsp. bulgaricus, Lactobacillus delbrueckii subspecies bulgaricus