仅就地球的母星系-银河系而言，每年都会出现数十次。

Several dozen a year happen in Earth's home galaxy, the Milky Way, alone.

youdao

仅就地球的母星系-银河系而言，每年都会出现数十次。

Several dozen a year happen in Earth's home galaxy, the Milky Way, alone.

youdao