Most of these micro-organisms cause no problem, and many, like the ones that normally live in the digestive tract and produce life-sustaining nutrients, are essential to good health.
大多数这些微生物不会引起任何问题，而且许多微生物，像那些通常寄生在消化道并产生维持生命的养分的微生物，对良好的健康是必不可少的。
The most immediate cause of the prosperity of Guangdong periodical industry is its commercial culture, while the essential communication concept of periodical publishing is the unique Lingnan culture.
广东大众期刊繁荣兴旺的最直接因素是广东商业义明，向特有的岭南文化是广东大众期刊传描理念的酵母。
The most immediate cause of the prosperity of Guangdong periodical industry is its commercial culture, while the essential communication concept of periodical publishing is the unique Lingnan culture.
广东大众期刊繁荣兴旺的最直接因素是广东商业义明，向特有的岭南文化是广东大众期刊传描理念的酵母。
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