污染

• They always enter fresh, uncontaminated solutions and wash tanks .
  它们都能使用新鲜的未经污染的溶液和水洗盆。
• The romans did not trust ground water since it was usually contamianted .
  由于地下水常遭污染，罗马人不相信它。
• The explosion at the chemical factory caused a major pollution scare .
  化工厂发生爆炸引起了害怕污染的巨大恐慌。
• Clothing can also become contaminated with dust, feathers, and excrement .
  衣着则会受到微尘、羽毛和粪便的污染。
• The external surface of culture vessel is, of course, subject to contamination .
  培养器皿的外面当然是被污染的。
• Contaminated instruments and floor surfaces should be chemically disinfected .
  污染的器材和地面要用化学药物消毒。
• Vegetables are subject to contamination by food handlers after harvesting .
  蔬菜通常是收获后被食品加工人员污染的。
• The problem of pollution arises along with the rapid development of industry .
  随着工业的迅速发展，产生了污染问题。
• Prolonged exposure to these pollutants may result in chronic disease .
  长期接近这些污染气体，就会引起各种慢性疾病。
• Contamination with viruses occures in experimental green houses and in the open .
  在实验温室和室外都能发生病毒的污染。