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Aspartame in diet sodas will naturally break down over time, especially if stored in higher temperatures, and in both diet and regular sodas the carbon dioxide will produce further carbonic acid (incidentally making itself flat), but aside from a change in flavour, the beverage is likely to be completely safe to drink -- and will probably still taste good. 汽水中的天冬甜素会随着时间自然削弱，尤其是被储存在高温条件下的时候，无论是饮用汽水还是普通苏打水中，二氧化碳都会产生更多的碳酸（可能会使它变瘪），但是除了味道上有所变化，饮料还是完全可以放心饮用的-而且味道可能依然很好。 It would take a very, very long time for the flavour to be affected enough to be completely unacceptable -- and even then it would still be safe. 让味道变得完全不可接受需要很长，很长的时间-但即使到那时汽水还是可以被放心饮用的。 | 
