In fact, we are hard pressed for a good working definition for life in the cosmic context.

实际上，我们正在做一项艰苦的工作——给宇宙生命下一个定义。

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Lyubomirsky's working definition of happiness — "a joyful, contented life" — gets at both the feelings and judgments necessary for overall happiness.

柳波默斯基给幸福下了一个实用的定义，认为幸福就是指快乐而又满足的人生。有了这个定义，就可以给总体幸福提供必要的感觉和判断依据。

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There is a rich body of academic literature in this field (see Resources), but a useful working definition is straightforward. Finite state machines are computer programs that consist of

此领域已出现了大量学术著作（参见 参考资料），而有限状态机的实用定义却十分简单明了。

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This is our working definition where small indicates that is has features too small for the unaided human eye to see.

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It would be more useful, perhaps, to simply describe certain of their key features and establish a working definition from there.

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While nothing she does is exaggerated, she somehow gives the impression of standing in an invisible spotlight, which is a pretty fair working definition of star quality.

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