该系统的研制成功为城市河湖的污染治理开辟了新途径。
The successful development of the system has broken a new path for the pollution control of rivers and lakes in urban areas.
离米德湖最近的大城市，拉斯维加斯其90%的城市用水来自科罗拉多河。
The metropolis closest to Lake Mead, Las Vegas, gets 90% of its water from this one source.
“五大湖及圣劳伦斯河城市倡议”的执行主管大卫.乌尔里希说。
"They just eat so much, " says David Ullrich, executive director of the Great Lakes and St. Lawrence Cities Initiative. "They're like the locusts of the river."
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