拼音：yì yī ér chū，bìng rì ér shí
注音：ㄧˋㄧㄦˊㄖˋㄦˊㄕˊ
解释：易：更换；并日：两天并成一天。只有一件衣服比较体面，谁外出就换上；一天的饭食分作两天吃。比喻非常穷困。
出处：《礼记·儒行》：“儒有一亩之宫，环堵之室，筚门圭窬，蓬户瓮牖；易衣而出，并日而食，上答之不敢以疑，上不答不敢以谄，其仕有如此者。”
Easy: replace; Merge day: two days merge into one day. Only one dress is more decent. Whoever goes out will change it; One day's meals are divided into two days. The metaphor is very poor.
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