font change character

例句：

1. 1. The font on the computer screen is too small for me to read clearly.
   电脑屏幕上的字体太小，我看不清。
2. 2. The designer chose a bold font to make the text more eye-catching.
   设计师选择了一款粗体字型，使文本更具吸引力。
3. 3. The font of this book is very old and has many characters.
   这本书的字体非常古老，有很多字符。