useful time

基本解釋

The arrest comes at a useful time for the government, which is facing war-weariness at home.
這次逮捕行動在時機上對于墨西哥政府來說非常有用，是時民眾正對反毒斗爭感到厭倦。
Most people who want to get ahead spend useful time writing personal notes of gratitude，sympathy and congratulations.
大多數(shù)想獲得成功的人都利用有用的時間來寫表示感謝、慰問和祝賀的私人信函。
edu.sina.com.cn
As with all dead things, holding onto it won’t keep it alive or change the fact that it’s useful time has come and gone.
死了的東西，堅持下去不會讓它復活，或者改變它有用的時間已經(jīng)來了并且過去了的事實。

But the kind of exercise we did last time is a useful exercise for those of you who are Econ majors.
但是我們上節(jié)課做的練習,對經(jīng)濟學專業(yè)的同學是非常有用的
耶魯公開課 - 博弈論課程節(jié)選
So you can scroll back through your history, which is also useful for time's sake.
所以我們可以滾回到我們的歷史記錄，這個可以節(jié)約我們的時間。
哈佛公開課 - 計算機科學課程節(jié)選
We'll talk a little bit about the principles of cellular physiology and then I'll move next time to talking about how you culture cells outside of the body and what that's useful for.
這節(jié)課我們講一些,細胞生理學的一些原理,下節(jié)課具體講,體外培養(yǎng)細胞的方法,及其用途
耶魯公開課 - 生物醫(yī)學工程探索課程節(jié)選

Our government is just as ineffective at providing useful real time economic data as it is at everything else it does.
FORBES: You Have To Believe In Hitchcock's 'McGuffin' To Be In Politics