过去几十年里，饭盒的样式经历了一场革命性的变化。

The last few decades have brought a new lunch box revolution, of sorts.

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尽管许多食品天然富含水杨酸盐，但在过去几十年里，食品加工公司也一直在食品中添加水杨酸盐作为防腐剂。

Although many foods are naturally rich in salicylates, for the past several decades, food-processing companies have also been adding salicylates to foods as preservatives.

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我们最初在2016年就有了这种怀疑，让我们感到困惑的事实是，当时国家统计数据显示，卡路里的消耗量在过去几十年里急剧下降。

We originally had this suspicion back in 2016, puzzled by the fact that national statistics showed calorie consumption falling dramatically over past decades.

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