A surprise military attack roused the nation from its lethargy.

一次令人吃惊的军事进攻把全国人民从昏昏噩噩中惊醒。

He asked us to be quiet and then made a startling announcement.

他叫我们安静下,宣布了一条令人吃惊的消息。

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.

天存或者实验室造的纤锌矿型氮化硼和朗斯代尔石数量很少，直到，没有一个人发它们令人吃惊的硬度。