The simulated Mars environment is called a habitat.

模拟的火星环境被称为栖息地。

It's the closest simulation to a Mars environment they can find.

这是他们能找到的最能模拟火星环境的方法。

A past Russian effort to create a simulated Mars environment, called Mars 500, was not highly successful, Hadfield said.

哈德菲尔德说，俄罗斯过去曾试图创造一个名为“火星-500”的模拟火星环境，但并不十分成功。