It's a waste of time and energy.

那是浪费时间和精力。

《牛津词典》

In my view it was a waste of time.

依我看，这是浪费时间。

《牛津词典》

"It's a waste of time," he concluded.

“这是浪费时间，”他最后说道。

《柯林斯英汉双解大词典》

In addition,news agencies provide updates and companies share product information through Twitter Some critics say Twitter is a waste of time that takes people's attention away from their work.

VOA: special.2009.02.06

It was a complete waste of time, unless the goal in life was simply to pester the user for some input.

刚才的时间就完全浪费了，除非那个唯一的目的,是简单地纠缠用户索要一些输入。

哈佛公开课 - 计算机科学课程节选

The last one that we saw was a complete waste of time.

我们看的上一部这种电影完全是浪费时间。

There is no 实战 - SpeakingMax英语口语达人

To call a business plan a waste of time seems a bit heavy handed.

FORBES: Why Business Plans Don't Work And 'Pivoting' Is Nonsense

The Liberal Democrats also criticised the proposed trials as "a waste of time and money".

BBC: NEWS | UK | Politics | ID cards 'cannot stop terrorism'

Campaigner Sharon Cheng said the move was "a disgraceful waste of time and taxpayer's money".

BBC: Protesters in Leeds