When the raw water can meet the requestment and cost lowly ,and the waste water should be treated before reuse ,even cost expensive,we have better neglect reuse.

• 当生的水能遇见请求和费用地位低的，而且废水应该在重复使用之前被对待的时候 , 甚至花费贵的,我们有比较好的疏忽重复使用。