应用微扰理论计算了双极化子和自由极化子的能带，以能带结构讨论了单重态和三重态双极化子的稳定性。
We have used the perturbation theory to calculate the energy bands of the bipolaron and the free-polaron, in order to investigate the stabilities of the singlet and the triplet bipolaron states.
本文的实验结果再次证实了双圆柱绕流的流态会在某些间距上出现突变，而在这些临界间距之间，流态则保持相对的稳定。
The jump between different flow patterns at certain critical position was discovered again in present experiment, and the flow patterns were relatively steady between the critical positions.
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