短語詞組短語device e context 設(shè)備上下文metafile device -context 圖元文件上下文device -context objects 設(shè)備對象output t device context 輸出設(shè)備上下文display device context 顯示設(shè)備內(nèi)容;顯示裝置情境DC -device context 設(shè)備上下文printer r device context 打印機(jī)設(shè)備上下文destination E device context 目標(biāo)設(shè)備上下文destination device context 目標(biāo)設(shè)備上下文 返回 device context