扩展 kuòzhǎn HSK4 expand Definitions Defs Origin Strokes Stroke Words Sentences Sents 扩展名 kuòzhǎnmíng file extension (file) extension (computing)可扩展标记语言 kěkuòzhǎnbiāojìyǔyán XML extensible markup language (XML)扩展坞 kuòzhǎnwù docking station 扩展程序 kuòzhǎnchéngxù extension an extension for a software application, especially for web browsers