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down the drain白白浪費
Informal expression describing wasted time or money.
We invested two years and a lot of money into our new invention, but it never worked properly, and now we feel that our efforts were all down the drain.
我們在新發(fā)明上花了兩年時間，投入了大量資金，但這個發(fā)明無法正常運行，現(xiàn)在，我們的努力全都白費了。
