有一句语法看不明白，还望老师赐教。
Such variations in size, shape, chemistry, conduction speed, excitation threshold, and the like as had been demonstrated in nerve cells remained negligible in significance for any possible correlation with the manifold dimensions of mental experience.
这句话书里面将such as的组合讲解为such thing as something，我的问题就是本句话as后面仿佛不是something而是一个句子。请问这句话的such as到底该如何理解？as后面是定语从句as （variations ） had been demonstrated 的省略形式吗？还请各位赐教！
这个结构根据传统语法是最好理解的，Such+名词+as引导的定语从句。把as剖析为关系代词，先行词被such修饰，定语从句用关系代词as取代that，引导定语从句，as指代先行词并在从句中作主语。
