自第一个任期以来，当选总统唐纳德·特朗普就一直对获得格陵兰岛表现出浓厚兴趣。格陵兰岛是丹麦的一个半自治领地，丹麦是美国的长期盟友，也是北约的创始成员国之一。格陵兰岛上还有一座大型美国军事基地。

Our memory always lingers in (on) the shore of Lake Baikal. Many years later, the memory of the old days fades away. The dancing snow is too cold to come with your warmness. The lifetime is so short ...

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.

Modern life makes us tired, right? But research from societies in Africa and South America suggests people in the ancient world slept only 6.5 hours a night.