Unfortunately, it also blurs the line between control and model.
但不幸的是，它同时也模糊了控制与模型之间的界限。
2
MathML 3 specifies a line breaking model and introduces several new attributes to control the properties of the line breaks and the way in which the lines are aligned.
MathML 3指定一个换行模型并引入几个新属性，来控制换行的属性以及行对齐的方式。
3
Stability calculation of the on-line stability control system of Fujian power system requires the real-time dynamic equivalence model of East China power grid.