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

纤锌矿型氮化硼和朗斯代尔石数量很少,直到现在,也没有一个人发现它们令人吃惊
硬度。
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择真题(英语二) 

择真题(英语一) Nancy Dubler, director of Montefiore Medical Center, contends that the principle will shield doctors who “until now have very, very strongly insisted that they could not give patients sufficient medication to control their pain if that might hasten death.”
蒙特非奥里医疗中心主任南希·都博勒认为,这项原则将消除部分医生的疑虑,这些医生在此之前一直强烈地认为,
果给病人充分的药品来止痛会加速他们的死亡的话工那就不能这样做。
For, as he is making increasingly plain, Mr Monti's ideas on how to resolve it are significantly at odds with those of the Germans who have until now been doing most of the ordering—and choosing pretty thin gruel.
因为蒙蒂正愈发清晰地表明在
何解决危机的问题上他与那些德国人的想法大不相同——到目前为止,德国主要是作为发号施令者(此前德国一直认为只有欧元区各国统一标准、严守财政纪律,才能克服欧元区管理存在的结构性缺陷——译注),却
有给
什么有效的解决措施。