DOCX 转 DOC
把现代版 Word 文档存成经典的 DOC 格式，供还没跟上 DOCX 的旧版 Word 和老系统使用。
来自
To
DOCX
The standard Microsoft Word document. Opens in Word, Google Docs, and virtually every modern office suite.
DOC
The classic Word format from before 2007. Still around in older archives and tools that never moved to DOCX.