The cast function is called twice to cast the values of the input parameters (for city and state) to appropriate data types.
CAST函数被调用两次，以将输入参数的值(针对城市和州)强制转换适当的数据类型。
2
The transition diagram also includes input symbols (in this case XML tags) and a transition function that controls how input symbols modify the state.
转换图还包含 输入符号（在本例中为 XML 标记）和控制输入符号如何修改状态的 转换函数。
3
The generalized constraint forces are then expressed as an explicit function of the state variables and generalized input forces, from which force information is therefore obtained.