Current X-ray lasers require facilities that are kilometres long. A cavity-based set-up about 66 metres in length has been developed that uses highly reflective mirrors to enable the generation of high-intensity pulses of narrow-band X-ray radiation. This promises to overcome the limitations of current X-ray lasers.
这个文集的名称也颇有巧思——致敬德国诗人里尔克《给一个年轻诗人的信》，这也是乔布斯生前最喜欢的读物之一。
，这一点在服务器推荐中也有详细论述
Алексей Гусев (Редактор отдела «Спорт»)
Москвичей предупредили о резком похолодании09:45