Citizens of wealthy nations demand national parks, clean rivers, clean air and poison-free food.
富裕国家的公民要求有国家公园、干净的河流、干净的空气和无毒的食物。
2
There are no national restrictions for applying salt to roadways, but in 1988 the EPA issued a report defining chronic and acute thresholds for chloride toxicity in streams and rivers.
国家没有公路用盐限制，但是1988年环保署在报告中定义了水溪河流中氯化物毒性的长期严重的门槛标准。
3
At present, teachers and students of all three rivers in a bid is a national high school model and to forge ahead!