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¶ÁÈ¡ÈÎÒⳤ¶È: fread()
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ɾ³ýÒ»¸öÎļþ: unlink()
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ÎļþËø¶¨: flock()
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Êý×éËæ»úÅÅÐò: shuffle()
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Êý×éת»»³É±êÁ¿±äÁ¿: extract()
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