tā / zǒu jìn / fáng jiān / yī bì / tuō / wài tào / yī bì / gēn / wǒ / dǎ / zhāo hu

他走进房间，一壁脱外套，一壁跟我打招呼。

He walked into the room, took off his coat and greeted me at the same time.