EPUB 转 FB2
不少以 FictionBook 为核心的阅读应用更偏爱 FB2 格式，把 EPUB 转过去正好满足这类阅读器的需要。
来自
To
EPUB
The open ebook standard used by most readers and stores. Text reflows to fit any screen size.
FB2
FictionBook — an open, XML-based ebook format especially popular in Eastern Europe and well supported by reading apps.