从键价的概念出发，对氧化物超导体中铜离子的有效电荷进行了计算。
Effective valences of copper in superconducting oxides were calculated from the concept of bond valence.
通过在带正电荷的Co3O 4周围包裹一大层带负电荷的石墨烯，可以为高性能锂离子电池制备出一个非常有效率的阳极。
Wrapping a large sheet of negatively charged df-G around a positively charged Co3O4creates a very promising anode for high-performance Li-ion batteries.
通过在带正电荷的Co3O 4周围包裹一大层带负电荷的石墨烯，可以为高性能锂离子电池制备出一个非常有效率的阳极。
Wrapping a large sheet of negatively charged df-G around a positively charged Co3O4creates a very promising anode for high-performance Li-ion batteries.
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