现在闭上你的眼睛，让它们休息一下，追忆一些颜色，比如黑色或白色，就是你能完美回忆的那种。

Now close your eyes and rest them, remembering some color, like black or white, that you can remember perfectly.

youdao

符头可以是黑色的(圆形或卵形)或白色的，用在五线谱上以表明音高。符头的形状在历史上有很多种，比如在单音歌颂中。

Noteheads may be black (a circular or oval shape filled in) or white and are used on the staff to indicate pitch. The shape of noteheads has differed historically, as in plainchant.

youdao