介词短语
中文翻译：在背部的侧面
同义词：
['on the side of', 'on the back of例句：1. He sat down on the side of the chair and started to read.（他坐在椅子的侧面开始阅读。）']
例句：
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1. He sat down on the side of the chair and started to read.
他坐在椅子的侧面开始阅读。
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2.She placed her hand on the back of the door to steady herself.
她把手放在门的背面来稳住自己。
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3.The old man leaned against the wall on the back of his chair.
老人靠在墙边，倚靠在他的椅子上。