UNITED NATIONS, June 10 (Xinhua) -- UN Secretary-General Antonio Guterres condemns Tuesday's school shooting in Graz, Austria, said his spokesman. The secretary-general is deeply shocked and saddened ...

​At least 10 people were killed in a school shooting in Austria's second-largest city of Graz, local media reported on ...

At least five people were killed and several others seriously injured in a school attack in Austria's second largest city of ...

Un tragico evento ha scosso la città di Graz, in Austria, dove una sparatoria avvenuta questa mattina ha portato alla morte di almeno dieci persone, tra cui il presunto attentatore. La notizia ha fatt ...

热诱导的原子和分子在表面上的扩散通常是一个随机过程，其由原子表面晶格上不相关的跃点组成。分子在表面上的热运动主要通过跳跃到表面相邻的晶格位置而发生，但理论上预测到了更大的位移。 在没有热运动的情况下，可以使用扫描隧道显微镜（STM）尖端 ...