a waste of

• 浪费, 白费

a waste of的用法和样例：

例句

1. He decried her efforts (as a waste of time).
   他贬低她所作的努力(认为是浪费时间).
2. I've finished with gambling it's a waste of money.
   我已经戒赌了－－赌博完全是浪费钱财。
3. That's simply a waste of time.
   这根本是浪费时间。
4. It is a waste of time to listen to his insignificant talk.
   听他那些废话纯属浪费时间。
5. It's a waste of money betting on that old nag!
   把赌金压在那匹老马上就是白扔钱！
6. The opposition parties have condemned the new airport as a waste of taxpayers' money.
   各反对党指责修建新机场是浪费纳税人的金钱。
7. It's only a waste of time to speak to her.
   和她说话纯粹是浪费时间。
8. It's a waste of time.
   这是浪费时间。