| 1. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
这些水由于例如化学工业和人畜垃圾等自然或者人为的污染变得不安全。 |
| 2. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
他们的水源因为自然或人为的污染而不安全，如工业化学物质或人或动物的排泄物。 |
| 3. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
不干净的水是由于自然或是人为的污染造成的，比如工业化学物质或是人类和动物的污染。 |
| 4. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
他们的水源提供不安全的因素有自然的或人为的污染，例如化学工业或人类和动物的废物。 |
| 5. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
他们的水源供应不安全，主要是由于自然和人为的污染，例如工业化学药品以及人畜的粪便。 |
| 6. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
他们的水源是不安全的，因为天然的或者是人为的污染，诸如工业污染或者人类和动物的粪便。 |
| 7. | Their water supplies are unsafe because of natural or man - made pollution , such as industrial chemicals or human and animal wastes
他们的水源供给是不安全的，这是由于自然或人为的污染（如工业化工品或人和动物的废弃物）造成的。 |
| 8. | Recent climate change is not caused by man - made pollution , but is instead part of a 1 , 500 - year cycle of warming and cooling that has happened for the last million years , say the authors of a controversial study
一个备受争议的调查报告作者称，近期的气候变化不是由人为的污染造成的，而是一个以1500年为冷暖循环周期的一部分。 |
| 9. | Recent climate change is not caused by man - made pollution , but is instead part of a 1 , 500 - year cycle of warming and cooling that has happened for the last million years , say the authors of a controversial study
据一项有争议的报告的作者，最近气候的变化并不是人为的污染造成的，而是百万年以来以1500年为周期的一个冷暖循环的一部分。 |
