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A: Well, no one could survive without water, but you see pollution has been making more and more water unable for drinking.
A：如果沒有水誰也活不了，但是你看，汙染正使越來越多的水沒辦法供人飲用。
B: Yeah. Water pollution has for a long time been a major concern among the environmental issues.
B：是啊，長期以來水汙染一直都是環境問題中備受關注的。
A: But what are the sources of water pollution?
A：但是都有哪些汙染源呢？
B: They could generally be divided into two categories: direct and indirect contaminant sources.
B：可以分為兩大類，即直接汙染和間接汙染。
A: Well, direct ones are the pollution directly from factories, refineries waste treatment plants etc., aren’t they?
A：嗯，直接汙染是指工廠、冶煉廠、廢水處理廠等地方直接排出來的廢物，是吧？
B: Yeah. They are emitted directly into urban water supplies.
B：對，它們不經處理就直接排到城市居民的飲用水源裡了。
A: But what about the indirect ones?
A：那間接汙染是什麼呢？
B: Indirect sources include contaminants that enter the water supply from soils or groundwater systems and from the atmosphere via rainwater.
B：間接汙染是從泥土、地下水系統以及通過雨水從大氣中進入水源的有害物。
A: I see. For the sake of us all, we should be an active participator in the prevention of it.
A：我知道了，為了我們自身的利益，我們大家都應該積極參與到防止汙染的活動中去。
B: Sure. It's an issue asking for everyone's participation.
B：就是，這是個人人都應該參與的事情。