Most people think of our own galaxy, the Milky Way, as a pure spiral, but astronomers now know it is actually a barred spiral.是什么意思_Most people think of our own galaxy, the Milky Way, as a pure spiral, but astronomers now know it is actually a barred spiral.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句