摘要

<正>主题语境:旅游篇幅:398词关键词:kids, travel, blind1A Canadian family is travelling the world before their kids go blind.2Three of Edith and Sebastien’s four kids, were diagnosed with a rare genetic (基因的) condition called retinitis pigmentosa (色素性视网膜炎). Most people who have this condition lose all of their eyesight by the time they are adults.