1. The net result is a continuous flow of gas, starting as hot gases in intergalactic space and ending as a drizzle of cool gas called a "cooling flow," falling into the central galaxy. 最终的结果是一股持续的气体流，开始是星系间的热气体，结束时是一股被称为“冷却流”的少量冷气体，落入星系中央。
2. Intergalactic travel remains just a nice idea. 银河间的旅行仍然只是个美好的愿望。
3. The physicist Fabian reasoned that as intergalactic gas cools, the cooler gas shrinks inward toward the center of the galaxy. 物理学家费边推断，当星系间的气体冷却时，较冷的气体向星系中心收缩。
4. The amount of "intergalactic rainfall" into some of these galaxies has been enough to double their mass in the time since they formed. 在这些星系中，“星系间降雨”的数量足以使它们的质量在形成的时间内翻倍。
5. Meanwhile, its place is taken by hotter intergalactic gas from farther out on the edge of the galaxy, which cools as it is compressed and flows into the galaxy. 与此同时，它的位置被更热的星系间气体所取代，这些气体来自更远的星系边缘，在被压缩的过程中冷却并流入星系。
