西尔维娅和保罗·卡斯特森，一对来自英国剑桥的退休夫妇，最近去纳米比亚度假了16天，在那里进行了观鸟之旅。

Sylvia and Paul Custerson, a retired couple from Cambridge, England, recently took a 16-day vacation to Namibia, where they went on bird-watching excursions.

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这对退休夫妇过着悠闲自在的生活。

The retired couple lived a life of ease.

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几名大学生在一对退休夫妇家搭伙并寄宿。

Several college students boarded with the retired couple.

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