最大的进步开始于1800年，当时法国人尼古拉斯·阿佩尔发现，他可以把某些食物密封在罐子里，不让空气进入。
The greatest single advance began in 1800 when a Frenchman, Nicolas Appert, discovered that he could preserve certain foods by sealing them in jars and keeping the air from them.
他试图把自己明显的快乐隐藏起来，不让已经走过来听的音乐老师发现。
He tried to hide his obvious pleasure from the music teacher, who had wandered over to listen.
因为主人被贪欲所迷惑，不愿意分享他的财富，所以我把墙洞填上了，不让他发现金子。
Since the owner was so obsessed with greed and unwilling to share his good fortune, I sealed the wall so he wouldn't find it.
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