"DoctorDr.Walter Bortz is a long jourvity longevity expert who says regular exercise is the key to better health later in life.
沃尔特医生是长寿方面的专家，他说常规的锻炼是晚年身体健康的关键。
"DoctorDr.Walter Bortz is a long jourvity longevity expert who says regular exercise is the key to better health later in life.
沃尔特医生是长寿方面的专家，他说常规的锻炼是晚年身体健康的关键。
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