秘密就在于他们一直在服用中草药,其中一种叫“太空养心丹”
How come 他 is so sure it is because of 太空养心丹?
Did they receive the same level of physical training as other countries crew?
Did they have same level of physical condition in general?
Did they use the same hi-technique to protect astronaunts from injury?
Maybe it is because our spaceship has better design, better technology to help them. You just don't know at this point.
草率的下结论,只能把中医推向末路。