为什么可汗说北京的生活比他想象的容易得多？
Why does Khan say life in Beijing is much easier than he'd expected?
来自美国的萨尔曼·可汗今年42岁，是可汗学院学习网站的创始人。
Salman Khan, 42, from the US, is the founder of the learning website Khan Academy.
可汗的网站不仅在全球大受欢迎，而且备受尊重。
Khan's website has not only become very popular worldwide but won a lot of respect.
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