Key to all columns

This spreadsheet contains an explanation of what the columns mean in all of the datasets. The titles of tabs correspond to the shortened filenames - each file has one tab.本电子表格对所有数据集的各列含义进行了详细阐释。各工作表标签的标题与简化后的数据集文件名一一对应，且每个数据集文件对应一个工作表标签。