But I don't know about the exact solution for the BlackBerry.
但我不知道关于黑莓的精确解。
The expressions of the exact solution are simple and closed in form.
该准确解表达式简单且为有限形式。
Moreover, the exact solution of a corresponding problem with initial boundary conditions is also given.
利用这个结果还求出了该方程组的初值一初值问题的精确解。
And then obtain exact solution of the problem by using analytic method.
然后采用解析方法求解，得到了问题的精确解。
To make calculation easy, another exact solution is also provided in the paper.
为便于计算，文中还给出了精确解的另一种形式。
To make calculation easy, another exact solution is also provided in the paper.
为便于计算，文中还给出了精确解的另一种形式。
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