HAMMOND — Families were spread across the lawn in front of the Pavilion at Wolf Lake Memorial Park, most with their own seating, to witness Morton High School’s Class of 2025 earn their degrees.

太空，绝非坦途。在每秒数公里速度飞行的轨道上，哪怕一粒毫米级的漆片，其撞击能量也堪比子弹。舷窗，作为返回舱结构完整性与乘员安全的生命线之一，其状态直接关乎再入大气层时能否承受上千度高温与巨大压力的严酷考验。