It is a waste of time going to the doctor with most mild complaints.

为了种种小毛病去看医生是浪费时间。

《柯林斯英汉双解大词典》

I think watching TV every evening is a waste of time — there are more meaningful things to do.

我觉得看电视很浪费时间，我们可以利用这些时间做更多有意义的事。

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This type of worker has confidence in his ability, and is likely to feel that collaboration is a waste of time.

这种类型的员工对自己的能力有信心，可能会觉得合作是浪费时间。

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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

And I am not going to take the time to solve it because I think that is a waste of class time, but those are the three unknowns.

但我并不打算把解这几个方程,我觉得那会是浪费课堂时间，但那是三个未知式。

麻省理工公开课 - 固态化学导论课程节选

I can't help thinking this is a complete waste of time.

我忍不住在想，这完全是在浪费时间。

I can't help but 实战 - SpeakingMax英语口语达人

He thinks all the fretting about the American economy is a waste of time.

NPR: Au Contraire, Economics

"I like nice things, but going to most stores is a waste of time, " he says.

FORBES: Magazine Article

Of course there are plenty of times when talking is a waste of time.

MSN: Talk Is Cheap, but Sometimes It's Worth More Than Text