Even with plans and water testing, two experts say Greeley's plan may not be perfect.

两位专家表示，即使有了计划和水质测试，格里利的计划也可能并不完美。

Water testing kits can go a step further and confirm the presence of many different contaminants and chemicals.

水测试套件可以更进一步，确认是否存在许多不同的污染物和化学物质。