几千年前，人们就发现了亚硫酸盐的一些妙用：它们能杀死细菌，或者降低细菌滋生和发酵的速度。
Thousands of years ago, people realized something nifty about sulfites: they kill or slow the growth of bacteria and most yeasts.
葡萄中含有亚硫酸盐的量非常少，在发酵过程中数量会有稍许的增加。
The amount of sulfites naturally in grapes is very small, and there's a bit more produced during fermentation.
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