你说的是不是“宽度因子”?,这里有它的解释
The widthFactor is applied to the text's width to allow the width to be adjusted independently of the height. For example, if the widthFactor value is 0.8, then the text is drawn with a width that is 80% of its normal "unadjusted" width.
For text created by AutoCAD, the width factor is used to adjust the text width if the text is referencing a text style that has a width other than 1.0, or the text's horizontal mode is AcDb::kTextFit.