1. As the result of a medical accident she was sightless.

 

　　是一起医疗事故夺去了她的光明。

 

　　2. While many blind people listen for echoes to some degree, Ben's ability to navigate in his sightless world is, say experts, extraordinary.

 

　　虽然很多盲人都在某种程度上倾听回音，但专家表示班恩在黑暗世界里来去自如的本领实在非比寻常。