tecplot中的各种标注都是类似于html文件的格式，如下，

粗体   <b>...</b>: Draw the enclosed characters using bold (if possible

 斜体   <i>...</i>: Draw the enclosed characters using italics (if possible).

下标   _...: Draw the enclosed characters as subscripts

上标      ^...: Draw the enclosed characters as superscripts.

希腊字母      <greek>...</greek>: Draw the enclosed characters using the Greek fon

数学符号      <math>...</math>: Draw the enclosed characters using the Math font

特殊符号    <userdef>...</userdef>: Draw the enclosed characters using the User-Defined font.

比如<greek>h</greek>₀ 就是    η₀