Only small amounts of wurtzite boron nitride and lonsdaleite exist naturally or have been made in the lab so until now no one had realised their superior strength.
天然存在或者实验室制造的纤锌矿型氮化硼和朗斯
尔石数量很少，直到
在，也没有一个人发它们令人吃惊的硬度。
碳Only small amounts of wurtzite boron nitride and lonsdaleite exist naturally or have been made in the lab so until now no one had realised their superior strength.
天然存在或者实验室制造的纤锌矿型氮化硼和朗斯尔石数量很少，直到在，也没有一个人发它们令人吃惊的硬度。
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达内容亦不
软件的观点；若发
问题，欢迎向我们指正。
