Sent_en: 2zh However, the Union of Concerned Scientists (UCS) said on February 12 that the debris could have taken 10 days or less to reenter over portions of the planet.
Sent_yy: 然而，“忧思科学家联盟”（UCS）于2月12日指出，这些碎片可能只需要10天或者更短一点的时间即可重返地球的某些部分。