The study took two sets of rats, both of who were subjected to an environment that simulated weightlessness.

实验设置了两组老鼠，都放置于模拟失重的环境中。

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The facility simulated confinement, stress and fatigue of interplanetary travel - the only thing not simulated was weightlessness.

该设备模拟诸如禁闭，压力和星际旅行带来的疲劳等状态——唯一没有模拟失重状态。

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AIM To examine and compare influence and time dependence of head up tilt (HUT) or standing (STD) on decline of contraction responses of rat femoral artery caused by simulated weightlessness.

目的观察和比较头高位（HUT）与站立位（STD）对模拟失重所致股动脉收缩反应性降低的影响及其时间依赖性。

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The study took two sets of rats, both of who were subjected to an environment that simulated weightlessness.

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There were many aspects of a real mission that could not be simulated in a Moscow suburb, of course - such as weightlessness and the dangers associated with space radiation.

BBC: Simulated Mars mission 'lands' back on Earth