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。
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