With the help of Bell-state measurements and Hadamard measurement an arbitrary two-particle state can be perfectly teleported if a receiver introduces a collective unitary transformation . The unitary transformation is given uniquely .

利用 Bell 态测量和Hadamard 门测量，如果 接收者引入一个联合幺正变换，就能实现一个任意两粒子态的 概率 传递，这个 联合幺正变换是唯一的。

Finally one day in1874 bell was at his receiver in one room trying to catch the signals sent by Watson from another room .

终于；在1874年的一天， 贝尔站在房内的接听器边，想 接收华特生从另一个房间里发出的信号。