Last year, I visited a special school for students with weak sight or hearing loss.
去年，我拜访了一所为视障和听障学生所开设的特殊学校。
A person with weak sight cannot see far.
视力差的人不能看得很远。
He suffers from weak sight and weak hearing.
他的视力听力都差。
What is weak sight and how can these be optically corrected?
什么是弱视？能通过光学镜片来校正吗？
What is weak sight and how can these be optically corrected?
什么是弱视？能通过光学镜片来校正吗？
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