Please note that acronyms and abbreviations must always be spelled out the first time they appear: in cases where a large number of acronyms and abbreviations are used, they should be presented in a list at the beginning of the document.
请注意首字母缩略词和简称必须在首次出现时标出全称：当有大量首字母缩略词和简称时，应当在文件开头附上缩略词和简称表。