This system also produces biomass, demonstrating how future life support systems  could supply astronauts with replenishable food.

该系统还产生生物质，展示了未来的生命支持系统如何为宇航员提供可补充的食物。

New  systems may generate an Earth-like cycle, which provides breathable air and replenishable food  for astronauts, and eventually space colonists.

新系统可能会产生类似地球的循环，为宇航员和最终的太空殖民者提供可呼吸的空气和可补充的食物。

We may possess the technology to put a  structure in space, but it's unlikely humans will create an affordable and replenishable  habitat in the coming century.

我们可能拥有在太空中建造结构的技术，但人类不太可能在下个世纪创造一个负担得起且可补充的栖息地。

Any habitat must have replenishable sources of  food, water, breathable air, and medical supplies; and it must spin to produce artificial gravity, though scientists are unsure how much gravity we need.

任何栖息地都必须有可补充的食物、水、可呼吸空气和医疗用品来源；它必须旋转才能产生人造重力， 尽管科学家们不确定我们需要多少重力。