undograph

例句：

1. 1.The undograph of the word "un" is pronounced as "oo-".
   单词“un”的音标是/oo/。
2. 2.In undograph, the letters are arranged in a way that resembles the shape of the letter "u".
   在undograph中，字母被排列成一种类似于字母"u"的形状。
3. 3. The undograph of the word "un" is pronounced as "oo-".
   单词“un”的音标是/oo/。