多个CSV文件.每张一张CSV文件.

Multiple CSV files. One CSV file per sheet.

逗号分隔值文件是纯文本格式.它只能表示平面数据，例如表格(或"Sheet")

A comma seperated value file is a plain text format. It is only going to be able to represent flat data, such as a table (or a 'Sheet')

要存储多张纸，应使用单独的CSV文件.您可以分别编写每个文件，然后分别将它们导入/解析到目的地.

For storing multiple sheets, you should use separate CSV files. You can write each one separately and import/parse them individually into their destination.