The Group To List projection can only apply to a group node (see the definition in the data model section) and it turns the group into a list of size one.
GroupToList映射仅可应用于一个组节点（参见数据模型部分的定义），它将组转化为一个单一尺寸列表。
The Group To List projection can only apply to a group node (see the definition in the data model section) and it turns the group into a list of size one.
GroupToList映射仅可应用于一个组节点（参见数据模型部分的定义），它将组转化为一个单一尺寸列表。
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