needless to say

例句：

1. 1. The extra expense was a needless waste of money.
   额外的开支是不必要的，浪费了钱。
2. 2. He spent the entire day doing nothing but reading, which was a needless waste of time.
   他整天无所事事地阅读，这是在浪费时间。
3. 3.The company's decision to invest in new technology was a needless expenditure on resources.
   公司决定投资新技术是在浪费资源。