space headache

(名詞) 太空頭痛：太空人在太空旅行期間所遭遇的一種會使身體虛弱的頭痛。

引句：
Astronauts need to add space headache to their list of occupational hazards, say researchers. ...

The researchers believe there are a number of reasons why space travel could cause headaches, the root cause being microgravity.

Microgravity is known to cause lower oxygen levels in the blood and this may be the trigger for space headache.
—"Space headache a real phenomenon," BBC News, June 2, 2009

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