名词文件扩展名

1. 文件后缀名：file-by-file compression 文件压缩 | filename extension 文件后缀名 | fill pattern 填充模式

noun

1. a string of characters beginning with a period and followed by one or more letters
the optional second part of a PC computer filename

e.g. most applications provide extensions for the files they create
most BASIC files use the filename extension .BAS

Synonym: extensionfile name extension