Covering spaces are a fundamental concept in topology. Some typical examples can be seen in this previous post.
这台机器是为那些没时间坐在电视机前，又或者不想在出差时同时塞进一台轻薄本和一台掌机的玩家准备的。
。PDF资料对此有专业解读
Россиянин получил срок за текст об украинском военном формировании14:58
他这个人非常的瘦小，当时大概40岁，有些秃顶。我觉得他非常像一个普普通通的中国研究所里搞科研的人。他母亲是新加坡的华人，所以有一点文化上的亲切感。
In a blow to households struggling with the cost of living, grocery price inflation rose to 4.3% in the four weeks to 22 February, after falling to 4% in January from 4.7% in December, according to the market research company Worldpanel by Numerator.