短語詞組短語explain function words 虛詞釋義disyllabic function words 複音虛詞unstressed function words 虛詞弱讀similarative function words 近義虛詞tibetan function words 藏文虛詞;藏語虛詞pragmatic function words 語用功能詞語function words system 虛詞躰系traditional function words 傳統(tǒng)虛詞 返回 function words