When experimental populations are set up under simple laboratory conditions, the predator often exterminates its prey and then becomes extinct itself, having nothing left to eat.

当实验种群在简单的实验室条件下建立起来时，捕食者往往会消灭它的猎物，然后自己也走向灭绝，因为没有东西可以吃。

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This was all a ruse, however, to set up a series of experimental conditions related to how hard to get each of the women appeared to be. Each woman fell into one of the following categories.

然而，这全然只是个为了建立一系列的实验条件而使用的一种伎俩，就是制造关于这些女性看上去有多难追的一种印象。

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Fifteen chimps and 24 children were introduced to the same experimental set-up: a room containing both a single end of rope and a doubled-over rope with two available ends.

15个黑猩猩与24个儿童面对相同的实验环境设定：一个有一端的绳子和两端的绳子的房间。

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For example, one of the experiments we do is measure the magnetic field of current coil, and after we do the experiment, we all have a passive visualization that shows the same experimental set-up, except we add to that.

比如，我们做的一个实验就是,测量电线圈的磁场，在我们做完实验之后，我们都感受到了一个直观化的过程,它展现了同样的实验过程，只是那是我们加的。

麻省理工公开课 - 媒体、教育、市场课程节选

Meanwhile, Dr Forrest's group has constructed an experimental set-up, described in a paper recently submitted to the Evolutionary Computation Journal, that mimics the way real immune systems identify invading pathogens.

ECONOMIST: A thousand ills require a thousand cures