拼音：huàn tāng bù huàn yào
注音：ㄏㄨㄢˋㄊㄤㄅㄨˋㄏㄨㄢˋㄧㄠˋ
解释：煎药的水换了，但是药方却没有变。比喻名称或形式虽然改变了，内容还是老一套。
出处：清·张南庄《何典》第三回：“那郎中看了，依旧换汤不换药的拿出两个纸包来。”
英语：a change in form but not in content
The water for decocting the medicine has changed, but the prescription has not changed. Although the name or form of metaphor has changed, the content is still the same.
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