保持水源清潔(Keeping Water Sources Clean)
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. the water we use comes from oceans, lakes, rivers or streams. but many of these water sources are getting seriously polluted. towns and cities are pouring dust into the water. many people are throwing all kinds of dirty things into the water. factories are pouring waste material into the water. therefore, water sources have become so badly polluted that some of the water is unfit to drink or to use. now it is high time that we should do something to protect our water environment from being polluted.
保持水源清潔
污染的水會使人生病甚至死亡，有誰愿意喝這樣的水呢?我們要保護水源，刻不容緩。我們用的水來自海洋、湖泊、河流或小溪，但這些水源有許多正受到嚴重的污染。城鎮(zhèn)乒把大量的塵埃排入水中，許多人正把各種;各樣的臟物投進水中，工廠正把廢物排入水中。因此，水源已經(jīng)污染嚴重，其中一些不適合再飲用�，F(xiàn)在到了.采取措施保護水環(huán)境使其免受污染的時候了。