这个成语经常被听到，但是它的具体意思是什么？
It's an often heard phrase, but what does it really mean? (See the top 10 financial collapses of 2008.)
你最喜欢的成语是什么？为什么？
是什么原因造成语言障碍还不清楚。但是有语言障碍的人与普通人相比，研究发现了在大脑活动和开发方面的差别。
What causes dyslexia is not clear. But studies have found differences in brain activity and development in dyslexic people compared to the general population.
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