每日英语俚语35: 前功尽弃；白费心机 (mp3和文本下载)
2017-03-14来源:和谐英语
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(go) down the drain
前功尽弃；白费心机；付诸流水
All our efforts went down the drain when the power went out.
电一停，我们努力全付诸流水。
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