就像任何安慰剂一样，它只有在权威指导下（使用）才能发挥效用。
Like any placebo, it must be dispensed with authority to be effective.
在大多数经济领域中，是卖方试图用价格、质量和效用等各种诱因来吸引潜在的买家。
In most sectors of the economy, it is the seller who attempts to attract a potential buyer with various inducements of price, quality, and utility.
草本植物的医药效用数不胜数。
当一项技术得到应用时，技术带来的影响远远超出了其本身的效用。
When a technology is deployed, its impacts reach far beyond itself.
这项工作（就像理论讨论戏剧“真实性”、“bienseance”和悲剧和喜剧的本质）强调需要道德效用。
This work (much like theoretical discussions on theatrical " vraisemblance ", "bienséance" and the nature of tragedy and comedy) stressed the need for moral utility.
不从效用角度谈论架构是很难的。
It's difficult to talk about architectures without the perspective of utility.
而效用可能包含很多因素。
故此，使效用加倍无法改变消费者的偏好。
Thus, doubling the utility doesn't change the preferences of the consumer.
他指的效用是什么呢？
生成质量属性效用树。
效用又分为基数效用和序数效用。
Utility can be divided into cardinal utility and ordinal utility.
这一巧妙的主意有直接的表面效用。
这种疗法的效用现在受到威胁。
客户使用有效用户ID和密码登录。
维生素对人们的心理效用很强。
表示效用，或完成所给任务的愿望。
The 'u' stands for utility, or the desire to complete a given task.
有很多种不同的球类运动有此效用。
There are many different ball games that can do this for us.
许多科学家研究了微笑的医学效用。
Considerable research has been conducted on the medical affects of laughter.
药物没有安慰剂效用。
而幸福数据不会直接帮助我们衡量效用与健康。
Yet happiness data do not enable us to directly measure utility and wellbeing.
这是期望效用理论。
That is expected utility theory. Then I'll conclude with this.
他们理所当然将保持其效用。
They will of course maintain their usefulness... It's there.
如果你吃的大多是鸡肉，效用就不大了。
If you eat mostly chicken, your savings would be less impressive.
在这个世界上，在我们周围，静有一种镇静的效用。
Stillness has a calming effect on the world around us as well.
电视对孩子有即时效用。
Television has an immediate impact on your child's behavior.
这种轻撞卫星的能力，具备和平及军事效用。
The ability to nudge satellites has both peaceful and military USES.
这种轻撞卫星的能力，具备和平及军事效用。
The ability to nudge satellites has both peaceful and military USES.
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