拼音：fù dōng liú
注音：ㄈㄨˋㄉㄨㄥㄌㄧㄡˊ
解释：付：交给；东流：向东的河流。扔在东流的江河里冲走。比喻希望落空，成果丧失，前功尽弃。
出处：元·关汉卿《金线池》第二折：“往常个侍衾裯，都做了付东流。”
Pay: hand over to; Eastward: a river flowing eastward. Throw it into the East River and wash it away. The metaphor is that hope is lost, achievements are lost, and previous achievements are wasted.
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