名词
中文翻译：后马
同义词：
['post rider', 'post-horse']
例句：
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1.The posthorse was a gift from my grandfather.
那匹后马是祖父送我的。
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2.The posthorse was used to transport mail in the old days.
那匹后马在旧时代用来运送邮件。
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3.The posthorse was a symbol of strength and endurance.
那匹后马象征着力量和耐力。