It can't. Water, like oxygen or steel or any other naturally occurring substance, is simply a chemical compound; it's ageless. However, humans have taken to storing natural-occurring water in plastic, artificial, flimsy containers, and the bottles can go bad. The plastic compounds can break down over time and leak into your water - and there are a few other things you didn't know about bottled water.
当然不会,水和氧气、钢或其它任何天然存在的物质一样,只是一种化合物;水是永恒的。然而,人类已经将天然存在的水存储到人造薄塑料瓶中,而瓶子是会变质的。随着时间的推移,塑料复合物会自行分解、渗透到水中--关于瓶装水,还有一些事是你不知道的。
Plus, plastic isn't impermeable. Algae or bacteria -not the good kind - seep in and grow inside your bottled water if you leave it for too long. This can still happen even if the bottle is closed. So if you've waited long enough, once you finally open up that "purified" water you're also likely opening up a bacteria-ridden breeding ground for harmful organisms.
另外,塑料是不渗透的。如果放的时间久了,藻类或细菌--坏的那种--会在瓶装水中渗入、生长。即使瓶盖盖的很紧,这种事情仍会发生。所以如果你等了很长时间,一旦你最终打开了"纯净"水,你也很有可能打开了一个细菌滋生的有害生物繁殖地。
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