And former president Jimmy Carter is in the hospital again after falling and fracturing his pelvis at his home in Plains, Georgia.

美国前总统吉米·卡特在乔治亚州普莱恩斯的家中跌倒，骨盆骨折，目前再次入院治疗。

Studies show that astronauts, for instance, lose 1% to 2% of their bone density for every month spent in space, and that would be especially concerning for giving birth because the pelvis could fracture in the process.

研究显示宇航员的骨密度在太空中每月都会降低1%至2%，骨密度对于太空分娩而言影响重大，因为骨盆可能会在分娩过程中骨折。