这些出生在普通家庭的孩子，多在阅读和数学方面存在着巨大的障碍，且平均水平大大低于地球上其他发达国家。
These children born in ordinary families, mostly in reading and mathematics there is a huge obstacle, and substantially lower than the average level of other developed countries on the planet.
1965年，杨利伟出生在辽宁省的一个普通家庭里。
Yang Liwei was born into an ordinary family in Liaoning Province in 1965.
1965年，杨利伟出生在辽宁省的一个普通家庭里。
Yang Liwei was born into an ordinary family in Liaoning Province in 1965.
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