名词
中文翻译：后背
同义词：
['back', 'rear', 'backside']
例句：
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1. She sat down on the couch with her back to the wall.
她坐在沙发上，背对着墙。
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2. The man walked around the room, his back turned to the camera.
那男人在房间里走来走去，背对着摄像机。
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3. The dog lay on the grass, its back facing the sun.
狗躺在草地上，背对着太阳。