In library, the contaminations can be divided into four parts: i. e. chemical contamination, physical contamination, biological contamination and radioactive contamination.
前言：图书馆内污染物按性质分为化学性污染物、物理性污染物、生物性污染物和放射性污染物。
The bean sprout crop that was the source of the outbreak requires a warm and humid environment to grow, which increases the risk of contamination by E. coli and other disease-causing bacteria.
豆芽菜的生长需要温暖潮湿的环境，这正好也适应大肠杆菌的生长，增加了被污染的风险。
The test is used to detect surface iron contamination, i. e., iron salt residue from pickling, iron tool scratches on the stainless steel surface, iron deposits at weld areas, and iron oxides.
该检测用于检测表面的铁的污染，如浸酸中铁盐残留，不锈钢表面的铁制工具的刮痕，焊接区的铁沉积以及铁的氧化物。
Using differential pressure switches, it is possible to, e. g. , transmit readings to a central control unit as soon as the filter has attained a specified degree of contamination.
使用压差开关一旦过滤器达到特定污染等级，可以传送读数至中央控制单元。
Using differential pressure switches, it is possible to, e. g. , transmit readings to a central control unit as soon as the filter has attained a specified degree of contamination.
使用压差开关一旦过滤器达到特定污染等级，可以传送读数至中央控制单元。
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