如果你现在离开学校,你所有的辛勤努力都将付诸东流。
If you leave the school now, all your hard work will go ___down ___the ___drain.
我以为所有那些晚间谈话和10万日元的投资都打了水漂。
All those evening conversations and the investment of 100,000 yen went ___down ___the ___drain, I thought.
当实验失败时,多年的研究都白费了。
The years of research went ___down ___the ___drain when the experiment failed.