短语讲解：

1. Many of the 285 million people who have vision problems live in low-income countries, according to the World Health Organization.

live in 住在学习[工作]的地方; 住在（某地）; 存在于…
例句："I was born in the east, but now live in Los Angeles."
我出生于东部，但现在住在洛杉矶。
according to 根据，按照
例句：According to her, grandfather called at noon.
据她说,祖父在中午打来电话。
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