對這些物質不是很了解。網上查到：
While both "sulfur" and "sulfites" involve the element sulfur, they are not the same. Sulfur is a natural element, while sulfites are a class of sulfur-based compounds, including preservatives, used to prevent spoilage and extend shelf life, particularly in food and beverages.
有機食物裏用鹽、糖作為保鮮機製，總是感到相對比較自然。
