They travel all over the world but end up in one corner. What are they?

Dịch câu hỏi:Chúng đi khắp thế giới nhưng cuối cùng lại ở một góc. Chúng là ai?

+> chúng là cái tem

Bằng tiếng anh: They often have colorful designs that depict different places or events from around the world. So, in a sense, stamps "travel all over the world" when they are used to send mail to different destinations. However, they eventually end up in one corner, which is typically the upper right-hand corner of an envelope or package where they are affixed.