Some character properties are independent of the context in which the character is used, for example, whether or not a character is customarily used as a numericaldigit.
有些字符属性与使用字符的上下文无关，例如，某一字符是否被作为数字使用就与上下文无关。
2
The method of digit fast sine sweep frequency is used in nonlinear suspention system frequency feature numerical solution.