There are several macro systems for scheme , but Scheme有几个宏系统,但是
Therefore , most schemes also include a non - hygienic macro system called 因此,大部分模式还包含一个非hygienic的宏系统,通常称为
Discussed how the scheme macro system allows an easy mixing of macro and non - macro code 就讨论了scheme宏系统如何简单地混合使用宏代码和非宏代码。
The two most widely used textual macro systems are the c preprocessor and the m4 macro processor 两个最广泛使用的文本宏系统是c预处理器和m4宏处理器。
As you can see , scheme s hygienic macros can bring you the benefits of other macro systems without many of their pitfalls 正如您可以看到的一样, scheme的宏可以提供其他宏系统的优点,却没有那些系统的问题。
The hydrology system have some characters of complicated open macro system to a certain extent , the complexity and indeterminacy of the hydrology system becomes more and more standing out with the hydrology scale changing from the microscopical to the midscopical , even to the macroscopical , which present spatial variability , differ between the unit and the system , the model re - parameterization and the different scale model coupling 水文系统在某种程度上具有开放的复杂巨系统的特征,随着水文尺度由微观到中观、宏观,水文系统的复杂性和不确定性就愈突出,表现有空间变异性、单元与系统的不一致性、模型的再参数化及不同尺度模型耦合等问题。