dead letter
柯林斯词典
1. N-COUNT If you say that a law or agreement is a dead letter, you mean that it still exists but people ignore it. 空文
No one does anything about it and the law becomes a dead letter. 沒人執行，該法律即成一紙空文。
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dead letter (dead letters)
剑桥词典
dead letter noun (MAIL)
[ 可數名詞：有複數形式的名詞 ]a letter that cannot be delivered to the address written on it and cannot be returned to the person who sent it
死信，無法投遞的信件
the dead-letter office 死信処理辦公室
dead letter noun (LAW/AGREEMENT)
[ 可數名詞：有複數形式的名詞 通常作爲單數使用的名詞 ]a law or agreement that is no longer effective
已失傚的法律；形同虛設的協議；空文
The ceasefire treaty was a dead letter as soon as it was signed , as neither side ever had any intention of keeping to it. 由於雙方缺乏遵守的誠意，停火協定一經簽署就成了廢紙一張。 返回 dead letter