[<< wikibooks] English-Hanzi/Our galaxy is very huge
Our galaxy is the Milky Way. It is very huge. Our sun moves around the center of the Milky Way for a cycle, needs to spend time about 240 million years.
我们 的 星系 就是 银河系。它是非常巨大的。我们太阳围绕银河系中心运行一圈,需时约2.4亿年。