Death of cells or tissues through injury or disease , especially in a localized area of the body 坏死因创伤或疾病引起的细胞或组织的死亡,尤其指身体局部面积的坏死
The defining feature is the gley horizon below the humus - blue - grey clay whowe color is due to ferrous iron compounds that have been reduced by microorganisms , flecked with localized areas of rust - colored oxidized ferric compounds 潜育土的一个重要特点是位于土壤腐殖质层之下,其土层呈灰蓝色是由于含有被微生物还原的亚铁离子,而且常有部分铁被氧化生成红棕色的锈斑。
To theenvironmental engineer , the word environment may take on global dimensions , mayrefer to a very localized area in which a specific problem must be addressed , or may , in the case of contained environments , refer to a small volume ofliquid , gaseous or solid materials within a treatment plant reactor 对于环境工程师而言,环境这个词可能包含全球范围,也可能只涉及到发生特别环境问题的某一局部区域,或者… …也可能指处理厂反应器内的少量的液体、气态或固态的材料等环境因素。