A comparision of the structures for C, CN x and BCN nanotubes indicates that a pentagonal structure hybridized with both B and N has lower formation energy than with only N.是什么意思_A comparision of the structures for C, CN x and BCN nanotubes indicates that a pentagonal structure hybridized with both B and N has lower formation energy than with only N.在线翻译_英语_读音_用法_例句