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开口大笑很容易,而要时常保持快乐的心态却很难,明白了这一点,你就会知道:上个世纪初,一位少年梦想成为帕格尼尼那样的小提琴演奏家,
It is easy to laugh openly, and it is hard to be happy at all times. With this in mind you will know that at the beginning of the last century a teenager dream became a violinist like Paganini,