| 1. | Office of environmental health hazard assessment oehha , usa
美国加州环境健康风险评估办事处 |
| 2. | California office of environmental health hazard assessment ( oehha ) , usa
美国加州环境健康风险评估办事处 |
| 3. | Environmental health hazards
环境健康危害 |
| 4. | Water is a common vehicle for the spread of pathogens , including bacteria , viruses and parasites , and other environmental health hazards
水是散播致病原，包括细菌病毒寄生虫等及环境中其他可危害健康的物质的常见渠道。 |
| 5. | Water is a common vehicle for the spread of pathogens , including bacteria , viruses and parasites , and other environmental health hazards
水是散播致病原，包括细菌、病毒、寄生虫等及环境中其他可危害健康的物质的常见渠道。 |
