It's a building with a circular ground plan, usually covered by a dome.

纪念厅就是有圆形大厅 上覆穹顶的建筑。

And a digital twin of the orbiting James Webb Space Telescope, perhaps the most complex instrument of its kind ever built, helps scientists on the ground plan changes and maintenance.

而环绕轨道的詹姆斯韦伯太空望远镜（James Webb Space Telescope）的数字孪生可能是有史以来最复杂的同类仪器，可以帮助地面科学家规划变更和维护。