supernova explosion短语⁵³³⁸² 基本例句 超新星爆发 They confirmed the presence of the Local Cavity, represented by the white area above, which scientists think was swept of gas by an old supernova explosion. 他们发现了一些局部空洞的存在，如图中的白色区域所示，科学家们认为这是超新星爆发后导致星际气体被吹散所致。 yeeyan