Supernova
例子
A supernova is a powerful explosion that occurs at the end of a massive star's life cycle.
超新星是发生在巨大恒星生命周期末期的强大爆炸。
The remnants of a supernova can form nebulae and enrich the interstellar medium with heavy elements.
超新星的残余可以形成星云,并用重元素丰富星际介质。



























