What is particularly meaningful to anthropologists is the realization that although the materials available to a society may to some extent limit or influence what it can do artistically，the materials by no means determine what is done.
(三个what引导的从句，第一个作主语，第二个与第三个都作宾语;that至句末的部分作realization的同位语)
对人类学家有着特殊意义的是这样一种认识：尽管一个社会能够得到的材料可能在一定程度上限制或影响它在艺术上的作为，但这些材料绝对不能决定该社会所做的事情。
分句1：What is particularly meaningful to anthropologists is the realization
分句2：although the materials available to a society may to some extent limit or influence what it can do artistically
分句3：the materials by no means determine what is done.
2和3并列
1和2，3嵌套，2和3是1中the realization的同位语
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