以下为句子列表：
英文: With the aid of a custom-made prosthesis, Ralston recently completed a climb of nearly 23,000 feet to the summit of Mount Aconcagua in Argentina, the highest peak in South America.
中文: 他已安装了度身定做的假肢，前不久还在阿根廷登上了南美洲最高的山峰——海拔2万3千英尺（6960米）的阿空加瓜山，直达山顶。
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