1. Regions of the universe with large positive vacuum energy experience expansions so virulent that a
supernova explosion would seem peaceful in comparison.
具有大的正真空能量的宇宙区域，所经历的激烈膨胀，使超新星爆发在相较之下显得相当温和。
2. A
supernova occurs when a hot, dense star burns up its fuel too quickly and suddenly implodes, generating shock waves and intense blasts of radiate across space.
超新星爆炸是由于一个炙热稠密的恒星过快燃尽了燃料，突然发生内爆，从而向太空释放出冲击波和密集的辐射。
3. The diffuse X-ray cloud is due to gas that has accumulated in the central region and been heated to millions of degrees, probably by shock waves from
supernova explosions.
弥漫的X射线云的成因是中心区域所积累并被加热到数百万度的气体，加热的可能原因是超新星爆发产生的激波。
