be up to something

常见例句

She must be up to something.
她一定在搞什麽鬼花招。
He must be up to something.
他一定是背後有什麽目的吧。
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I heard you two whispering so I know you must be up to something .
我聽見你們倆嘀嘀咕咕的就知道沒做什麽好事。

And that's something that you have to be willing to put up with."
Deflection up and deflection down indicating that there was something strange that had yet to be accounted for.
發生了偏離,這就說明還有一些奇特的現象,需要我們去解釋。
麻省理工公開課 - 固態化學導論課程節選
so I don't know, I think it's just really cool to be able to work something from the ground up.
所以，我不知道，我就是覺得能從頭開始做一件事很酷。
什麽是認知科學？ - SpeakingMax英語口語達人

So I believe that everybody should be prepared to give up something in order to solve our budget challenges, and I think most public servants agree with that.
WHITEHOUSE: President Obama and Vice President Biden Address National Governors Association The White House
Microsoft wants people to build internet infrastructure that has the ability to feed high definition video to every screen in your house, so we want the incentive to be there for people to build up new networks and we want that network to be something that content from everyone is sort of treated in a reasonably equal way.
ENGADGET: A lunchtime chat with Bill Gates at CES
Developers like Facebook would be wise to come up with something for Windows 8 posthaste.
ENGADGET: Windows 8 review