The second and third ellipses use an alpha component of 128, so they are semitransparent; you can see the background image through the ellipses.是什么意思_The second and third ellipses use an alpha component of 128, so they are semitransparent; you can see the background image through the ellipses.在線(xiàn)翻譯_英語(yǔ)_讀音_用法_例句