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
朗斯代尔石数量很少，直到现在，也没有一个人发现
们令人吃惊的硬度。
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朗斯代尔石数量很少，直到现在，也没有一个人发现们令人吃惊的硬度。
声明：以上例句、词性分类均由互
源自动生成，部分未经过人工审核，其表达内容亦不代表本软件的观点；若发现问题，欢迎向我们指正。
