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
的纤锌矿型氮化硼和朗斯代尔石数量很少，直到现在，也没有一个
发现它们令吃惊的硬度。
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.
天然存在或者实验的纤锌矿型氮化硼和朗斯代尔石数量很少，直到现在，也没有一个发现它们令吃惊的硬度。
声明：以上例句、词性分类均由互联网资
生成，部分未经过
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。
