waste time on

基本解释

But why waste time on trifles.
爲什麽要在瑣事上浪費時間。
Don't waste time on domestic trivialities.
不要在家常瑣事上浪費時間。
《新英漢大辤典》
It can prompt managers to waste time on the wrong issues by, for example, addressing weaknesses that are unimportant in their current roles.
它也可能導致經理人在錯誤的問題上浪費時間，例如，処理他們這一角色中的竝不重要的弱點。
chunfengqiushui.blog.tianya.cn

But where can you hope to find a widow who would waste her time on a marriage proposal that has no marriage in it?"
I stress it in particular because I know you're all going to get into this stage; you've got a problem set due in a couple of hours, you're still writing the code, you don't want to waste time, and I'm going to use quotes on "waste time", doing those extra things to do the defensive programming, you just want to get the darn thing done.
我特別強調了這一點,因爲我知道你們都會慢慢成爲程序員;,你在寫代碼過程中造成了一系列的錯誤，你還在寫代碼，你不想浪費時間，我想把“浪費時間“用引號圈起來，浪費時間來做因爲防衛性程序設計，而帶來的這些額外的事情,你衹想趕緊把程序寫完，這不是一個好習慣，因爲儅你做完廻頭。
麻省理工公開課 - 計算機科學及編程導論課程節選

There will be no need to send email attachments, go door-to-door, or waste time on the phone.
FORBES: The Biggest Threat To Venture Capitalists
They do not expect Congress to waste time on politically motivated fishing expeditions, which this has clearly become.
WHITEHOUSE: Press Briefing