Narrator: Scientists around the world worry about blindness. When people cannot see, their lives are not easy. So one blind man ran a marathon. That is more than 42 kilometers! People gave him money for running. He helps blind people and scientists with the money.

當人們看不見的時候，生活會變得很困難。一位失明的男子決定挑戰馬拉松賽！許多人捐款給他，而他用這個錢來支持視障人士和科學研究。

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