Another area of research is the process by which these helpful bacteria first colonise the digestive tract 另一研究领域是关于这些有益细菌最初是如何“进占”消化道的。
2.
Such use as we are able to make of helpful bacteria and such control as we have of harmful ones depend upon our knowledge of their habits 我们对有益细菌的利用和对有害细菌的控制都有赖于我们对细菌习性的了解。
