translation.en: Now, many of the problems that children with autism face, they have a common source, and that source is that they find it difficult to understand abstraction, symbolism.
translation.zh: 许多自闭症儿童所面临的问题， 它们有一个共同的根源， 而这个根源就是他们觉得 很难理解抽象概念和符号。