dead letter 的英语意思
dead letterˌdead ˈletter noun [countable] 
查看全部语言翻译1a law, idea etc that still exists but that people no longer obey仍然存在但已无人遵守的法律、观念等2a letter that cannot be delivered or returned无法投递也无法退回的信件
查看全部语言翻译1a law, idea etc that still exists but that people no longer obey仍然存在但已无人遵守的法律、观念等2a letter that cannot be delivered or returned无法投递也无法退回的信件