常見例句Changeover and changeback procedures LT 轉(zhuǎn)換和轉(zhuǎn)回過程changeback acknowledgement signal 轉(zhuǎn)回證實信號changeback declaration signal 轉(zhuǎn)回聲明信號changeback code 換向代碼changeback procedure 轉(zhuǎn)回程序, 轉(zhuǎn)回過程 返回 changeback