In this paper, we analyse the structure of single wall boron nitride nanotubes and classify the vibration of the crystal lattice.
本文分析了氮化硼纳米管的结构对称性，并对其晶格振动模的对称性进行了分类。
Gallium nitride single crystal is grown in atmosphere composed of gases mixture 'B' containing nitrogen gas at a pressure of 300 atms or higher and 2000 atms or lower.
在包含含有氮气的混合气体b的气氛下，在总压为300气压以上、2000气压以下的压力下，生长氮化镓单晶。
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