这个是第一次听说,所以上网查了一下。高空飞行是有cosmic radiation,不过按照以 下的数据,回国一次的辐射,并不会超过限额: Both the National Council on Radiation Protection and Measurements and the International Commission on Radiological Protection recommend a maximum annual radiation exposure limit of 1 millisievert (mSv) (100 rem) for members of the general public and 1 mSv over the course of a 40-week pregnancy (7). Even the longest available intercontinental flights will expose passengers to no more than 15% of this limit (7); therefore, it is unlikely that the occasional traveler will exceed current exposure limits during pregnancy. 摘自: http://www.acog.org/Resources%20And%20Publications/Committee%20
would
【在 C********g 的大作中提到】 : The radiation is really bad, especially during long distance flight. I would : not recommend.