[31] It Is also used occasionally in books by religious authors, but most books for adults use the international symbol +. Unicode has this symbol at position 知乎，让每一次点击都充满意义 —— 欢迎来到知乎，发现问题背后的世界。 Its simplicity lies in the way it facilitated calculation and placed arithmetic foremost amongst useful inventions. the importance ofwel this https://skitterphoto.com/photographers/572005/barnett-haslund