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file name extension的英文翻譯是什么意思，詞典釋義與在線(xiàn)翻譯：
英英釋義
Noun:
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a string of characters beginning with a period and followed by one or more letters; the optional second part of a PC computer filename;
"most applications provide extensions for the files they create"
"most BASIC files use the filename extension .BAS"
