As far as the discussion about the structures is concerned , to some extent , it may be said to be an application to the backlund transformation : fix a solution qn to the system ( l . 3 ) , construct a group of solutions qn different from qn through the backlund transformation , and then prove that qn is convergent to qn . in the section 4 , it is vital for us to find out the fixed solution n to the equation ( 3 . 1 ) in the theorem3 . 2 , which is completed in the lemma4 . 2 and theorem4 . 3 第四节对方程( 1 . 3 )的解的性态的讨论，在一定程度上也可说是对定理3 . 2的一个应用：给定方程的一个解q _ n ，然后通过贝克朗变换构造了一系列不同于q _ n的解q _ n ，之后证明了q _ n收敛于q _ n 。
In this paper , we give the backlund transformations and discuss its structures to some extent for the integrable discretization of the nls1 " equation : the transformation gives a way to construct solutions to the system ( 1 . 3 ) , and it also does to the equation ( 3 . 1 ) , which contribute to reconstruct solutions to the system ( 1 . 3 ) 贝克朗变换给出了一种构造方程( 1 . 3 )解的方法，同时也给出了构造其拉克斯对方程( 3 . 1 )解的方法，这就给我们对方程( 1 . 3 )的解进行重复构造创造了条件。
