粟一燒 60%的氮氣

滿心歡喜去買粟一燒,脹鼓鼓的包裝實在吸引,一拆之後才發現粟一燒只佔容量的40%,連一半也沒有,是我把剩下的60%氮氣放走了嗎?我知道氮氣對此類食品的重要性,防腐防壓吧,不過我萬萬也料不到空氣比食物還要多。究竟我買的是空氣還是食物?

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