高速公路加速车道的设置长度不仅取决于主路及匝道的设计速度，还与主路及匝道的交通量有关。
The length design of the acceleration lane depends on not only traffic speed but also traffic volume of the main line and ramp of expressway interchanges.
如果将该字符串设置为无效长度的值，该代码没有问题，但是生成的XML将无法通过验证。
If the string is set to a value with an invalid length, the code is OK, but the XML generated fails validation.
HATS将根据标题长度自动设置每个选项卡的宽度。
HATS will automatically set each TAB width based on the length of the header.
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