Through the optical telescope, NGC 6240 is shaped like a butterfly. It is so odd-looking because it is in fact the result of the collision of two spiral galaxies.是什么意思_Through the optical telescope, NGC 6240 is shaped like a butterfly. It is so odd-looking because it is in fact the result of the collision of two spiral galaxies.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句