| 1. | Is the water polluted at source or further downstream ? 河水是在源头还是在流出之后受到污染的? |
| 2. | The public insist that pollution control measures be installed . 公众坚决主张采取控制污染的措施。 |
| 3. | 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。 |
| 4. | 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。 |
| 5. | 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。 |
| 6. | 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。 |
| 7. | 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。 |
| 8. | Industry, it turned out, accounted for only ten percent of the smog in the city . 后来发现,工业污染仅占该市空气污染的10。 |
| 9. | With contaminated hand, turn the child's head to right side to suction left bronchus . 用已污染的手将小儿的头部转向右侧以吸引左侧支气管。 |
| 10. | The generation of aerosols in polluted atmospheres has been investigated in several experiments . 在几个实验中已经研究了污染的大气中气溶胶的产生。 |