The structure, material, specific surface area and roughness of bio media are the important factors influencing the efficiency of in situ bio film technique.
填料的结构、材质、比表面积及粗糙度等是影响原位生物膜技术的关键因素。
2
Many textbooks, particularly those in economics, contain appendixes that provide specific information on reading and working with graphic material.
许多教科书都有附录，尤其是经济学教科书。这些附录提供了阅读和使用图形材料的具体信息。
3
Introduction of specific genetic material into rapidly reproducing target bacteria can turn the cells into miniature factories for production of useful substances.