And now scientists say they've discovered some new risks with long term space flight.

现在科学家表示，他们发现长时间太空飞行还存在其他风险。

Long term space missions will always benefit from the bold ingenuity of humans like you.

长期的太空任务将永远受益于像你这样的人的大胆创造力。

Another consideration, the health effects of long term space missions could be a significant challenge for medical science.

另一个考虑因素是，长期太空任务对健康的影响可能是医学科学面临的重大挑战。

Tracking these brain's responses might shed light not only on how to treat illnesses like dementia, but also on how to make long term space missions possible.

追踪这些大脑的反应不仅可以帮助我们治疗痴呆症等疾病，还可以帮助我们实现长期的太空任务。

Those who spend months on the International Space Station regularly exercise to help prevent this loss, but this kind of training might not be possible during long term space flight.

那些要在国际空间站度过数月的人会有规律地锻炼以防止肌肉消失，但这种训练可能对长期进行宇宙飞行的人没有效果。

Many astronauts have complained of eye and back problems after coming back down to Earth and its gravity, and now scientists say they've discovered some new risks with long term space flight.

许多宇航员在返回地球重力环境后反应了眼睛和背部出现的问题，现在科学家们说他们发现了一些长期太空飞行的新风险。