Colleagues who don't trust one another will need to spend more time watching their backs than doing any useful work.

对于互不信任的同事来说，比起做任何有用的工作，他们需要花更多的时间去小心提防他人。

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According to the Centre for Strategic and International Studies, about three quarters of energy we use to move things, including ourselves, accomplish no useful work.

根据战略与国际研究中心的数据，我们用于移动包括我们自己的物体的能量中，约有四分之三没有完成任何有用的工作。

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According to the Center for Strategic and International Studies, about three quarters of the energy we use to move things, including ourselves, accomplishes no useful work.

战略与国际研究中心表示，包括我们自己在内，我们用来移动事物的能量中，约有四分之三的能量没有产生有用功。

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"What we've proven to be useful and what does work is having a person in a stressed state, and then reducing that stress because it's that contrast is what motivates a person to cooperate, what motivates a person to start talking.

VOA: standard.2009.04.17

One useful thing about separating receptors into types or families is that we found that many different receptors work by the same basic underlying mechanism.

我们将受体进行分类的一个依据,就是我们发现,很多受体有相同的作用机制

耶鲁公开课 - 生物医学工程探索课程节选

And I thought it would be useful And I thought it would be useful to have to have opportunities to work with students opportunities to work with students about the issues about the issues outside the classroom outside the classroom that might either inform or impede that might either inform or impede their development their development as scholars.

我觉得，如果有机会与学生交流,我觉得一个有用的办法,会很有益,是创造机会和学生们一起处理,与他们讨论课外的问题,课外一些可能会影响或阻碍,这些问题可能促进或者阻碍,他们作为学者的发展的问题。

普林斯顿公开课 - 人性课程节选

Unfortunately, there aren't enough of them to do much useful work on modern software.

WSJ: Here's How to Survive Shopping for a PC

Harness a few thousand of these minute bursts of energy, and some useful work could be done.

ECONOMIST: Micromachines: The engines of Lilliput | The

Vice-presidents have since become important political figures as their presidents have given them useful work to do.

ECONOMIST: Endicott Peabody