The rings are always in pair, But weared in two separate ring finger.

婚戒虽成双成对，却都戴在两个单独的无名指上。

The evolution of fidelity of quantum information in pair atoms of entanglement state interacting with coherent light field was investigated.

研究了初始处于纠缠态的双原子与相干光场的相互作用。