To avoid contamination, Wells in the Bengal Basin can be drilled into deep layers that were oxidized during the last ice age, in which the water is free of arsenic, Berg says.
为了防止被污染，孟加拉盆地的水井钻入了在上一个冰河时期被氧化的深层地层中，这一层的水是不含砷的，伯格说。
The standard states that the citric acid-sodium nitrate treatment is the least hazardous for removal of free iron and other metallic contamination and light surface contamination.
该标准声明：柠檬酸-硝酸钠处理在去除游离铁合其他金属污染和轻的表面污染物时，危险性最低。
The presence of exogenous surface contamination, including dirt, grease, free iron from contact with steel tooling, and so forth, may interfere with the formation of the passive film.
外生的表面污染，包括：尘土、油脂、来自钢铁加工的游离铁等等，可以影响到钝化膜的生成。
To ensure all food served to guests and employees are free of microbiological, chemical and physical contamination, and all work areas conform to minimum requirements set by local health authorities.
确保为客人和员工提供的所有食物均没有任何微生物、化学和物理污染，并且所有工作区域符合地方卫生当局的最低要求。
The unique advantages are: no contamination, high efficiency, free from power, less weight, easy for cleaning and maintenance and wide range of application.
具有：无脱落污染、效率高、不需电能消耗、重量轻、容易清洗、便于维修、应用范围广泛等特点。
Conclusions With the application of the "m" serum - free medium, the technique of Schwann cell culture was simplified and the contamination of fibroblasts was effectively controlled.
结论应用“M”无血清培养液简化了雪旺细胞的培养技术，有效地控制了成纤维细胞的污染。
In view of the huge damage of high voltage insulator contamination flashover, an on-line monitoring and measurement system of insulator contamination based on free software is designed.
针对高压绝缘子污秽闪络的巨大危害，采用自由软件设计了绝缘子污秽在线监测系统。
The invention relates to many articles, particularly those public use materials for easy contamination, free from scribbling, without prevention of the sticky paper.
现有的很多物体，尤其是公共使用的物体，表面易粘污、不防涂画、不防粘贴纸张。
The invention relates to many articles, particularly those public use materials for easy contamination, free from scribbling, without prevention of the sticky paper.
现有的很多物体，尤其是公共使用的物体，表面易粘污、不防涂画、不防粘贴纸张。
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