down the drain 白白浪费的（非正式）

英文释义

(INFORMAL) An adjective phrase describing anything that is lost or wasted.

例句

We put more money into our family’s business every month, but we think it’s just money down the drain because the whole business is a hopeless disaster.

我们每月都向家族企业里投入更多的钱，但我们觉得，这纯属白白浪费，因为整个企业已经是不可救药的灾难。