我们应该保持水源清洁。
保持水源清洁污染的水会使人生病甚至死亡，有谁愿意喝这样的水呢？我们要保护水源，刻不容缓。
Who is willing to drink the polluted water? It can cause us to be ill and even to die. We can't wait for a moment to protect our water sources.
保持水源清洁污染的水会使人生病甚至死亡，有谁愿意喝这样的水呢？我们要保护水源，刻不容缓。
Keeping water Sources Clean Who is willing to drink the polluted water? It can cause us to be ill and even to die.
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