diphtheroid bacillus

例句：

1. 1.The diphtheroids are a group of bacteria that can help with digestion.
   双歧杆菌是一种可以帮助消化的细菌群体。
2. 2. The diphtheroids were found in the human gut, where they play a crucial role in maintaining good health.
   双歧杆菌存在于人体肠道中，它们在维护健康方面起着至关重要的作用。
3. 3. Researchers have been studying the effects of these bacteria on human health for decades.
   研究人员已经研究了这些细菌对人类健康的影响几十年了。