Animal experiments by psychologists at the University of Pennsylvania had shown that after repeated failures, most animals conclude that a situation is hopeless and beyond their control.

宾夕法尼亚大学的心理学家进行的动物实验表明，在多次失败之后，大多数动物都会作出这样的结论：情况已无可救药，超出了它们的控制范围。

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Their government has no right to injure them by financial experiments that are opposed to the policies of other nations."

VOA: special.2010.06.24

They're actively engaged in the material, actually seeing the phenomena, by making measurements of real world experiments.

学生们能自主地参与到物质中，看见真切的现象，通过对真实世界实验,做出测量。

麻省理工公开课 - 媒体、教育、市场课程节选

We will give many lectures, ten or fifteen minutes of lectures, and that will be broken up by desktop experiments where the students collaborate with each other, doing experiments.

我们会讲很多小讲座，十或十五分钟一个，这些讲座中会间隔地穿插,桌面实验,学生可以一起合作，做实验。

麻省理工公开课 - 媒体、教育、市场课程节选

By 1948 the Nuremberg Code, inspired by revelations of experiments in the Nazi death camps, set standards for medical studies on human subjects.

ECONOMIST: Ernest Hendon

The federal government that Franklin helped design meant that states would largely be the locale for bold experiments by the strident.

FORBES: What Would Ben Franklin Say About An America In Decline?

And, as with some of the earlier science experiments conducted by the rover, the scoop results - when they come - are expected to be fairly mundane.

BBC: Nasa's Curiosity Mars rover to scoop sand sample