标题： 宇宙微波背景各向异性和宇宙的几何结构 显示英文标题

标题： Cosmic Microwave Background Anisotropies and the Geometry of the Universe

摘要： 在本次演讲中，我回顾了一些关于开放宇宙中宇宙微波背景（CMB）各向异性的最新研究。我强调，观测到的CMB各向异性仍与$\Omega$的低值一致，并探讨了未来CMB测量是否能够提供关于宇宙几何的信息。 显示英文摘要

摘要： In this talk, I review some recent work on cosmic microwave background (CMB) anisotropies in an open universe. I emphasize that the observed CMB anisotropies are still consistent with a low value of $\Omega$, and I address the question of whether future CMB measurements will be able to provide information on the geometry of the Universe.