关于and与逗号的一句实例讨论

路游人

问题句：

" Reform" in America has been sterile because it can imagine no change except through the extension of this metaphor of a race, wider inclusion of competitors, " a piece of the action", as it were, for the disenfranchised. (摘自难句教程）

补充完整后：

= "Reform" in America has been sterile because it can imagein no change except through the extension of this metaphor of a race, except through wider inclusion of competitiors, except through providing " a piece of the action" for disenfranchised, as it were.

此句中“except through the extension of this metaphor of a race, except through wider inclusion of competitors, except through providing ' a piece of action', as it were, for disenfranchised." 三个并列的介词短语来修饰物because引导的原因状语从句

诚问：

为什么到了第三个"except through'a piece of the action'的前面不需要加一个"and"呢？应该是“, and except through providing 'a piece of the action', as it were, for disenfranchised." 才对。求高人解答。

路游人

没人解答么？