Among the areas suggested is the sanjiang region in heilongjiang , a protected wetland .
顾问所推荐的地区之一，就是黑龙江省的受保护湿地三江地区。
It is not known how long a wetland can continue to remove p from wastewater .
目前尚不知道多久，湿地可以继续从废水中除去磷。
Burke says the importance of turtles is that they serve as a barometer of a wetland 's health so many conservation biologists watch their numbers closely .
