在俄罗斯西北部普斯科夫地区的这些儿童很幸运，因为他们还有学可上。
These children in the Pskov region of north-west Russia are lucky to be at school.
希蒙·普斯泰尔尼是波兰克拉科夫压盖洛尼安大学的物理学家。
Szymon Pustelny is a physicist at the University of Galonian in Kraków, Poland.
“如果你开发的功能被1000万人使用，有10%的人不喜欢它，你收到的恶评简直会把你淹没，”工程部副总裁迈克·斯科罗普夫(MikeSchroepfer)说。
"If you roll out a feature to 10 million people and 10% don't like it, that's a lot of hate mail," says Mike Schroepfer, VP of engineering.
“如果你开发的功能被1000万人使用，有10%的人不喜欢它，你收到的恶评简直会把你淹没，”工程部副总裁迈克·斯科罗普夫(MikeSchroepfer)说。
"If you roll out a feature to 10 million people and 10% don't like it, that's a lot of hate mail," says Mike Schroepfer, VP of engineering.
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