youdao

This means that all temporary variables used by a macro are automatically renamed before the substitution occurs in order to prevent them from having conflicting names.

这意味着宏所使用的所有临时变量都会在替换发生之前自动重新进行命名，从而防止名字产生冲突。

youdao

There's no need to go through the read_inheritable_attribute macro to use attributes because these are class instance variables defined by ActiveRecord.

不需要通过 read_inheritable_attribute 宏来使用属性，因为这是 ActiveRecord 定义的类实例变量。

youdao

No wonder: Many of the macro-economic variables are benevolent.

FORBES: The Road Less Traveled

In emerging markets, you cannot ignore the macro-economic and political variables that drive particular countries.

FORBES: The Emerging Market You Might Have Overlooked