1. The "pointer to member" is distinct from the type "pointer", that is, a pointer to member is declared only by the pointer to member declarator syntax, and never by the pointer declarator syntax. 成员指针和普通指针截然不同。成员指针只能用成员指针声明的语法声明，不能用一般的指针声明方法声明。
2. Place the mouse pointer between the arrows and, when the pointer turns into a double-headed arrow, you can move the margin (the indent arrows will move with it). 滑鼠指针放置在箭头之间，指针变成双向箭头后，您可以将移动页边距（缩进箭头将与它一起移动）。
3. It must be convertible to a raw pointer and constructible from a raw pointer. 它必须可以转型为裸指针，以及可以从裸指针构造。
4. Place the mouse pointer between the arrows and, when the pointer turns into a double-headed arrow, you can move the margin (the indent arrows will move with it). 鼠标指针放置在箭头之间，指针变成双向箭头后，您可以将移动页边距（缩进箭头将与它一起移动）。
5. Turn on and cut function details: The table shows the turn on and cut situations as pointer moves deasil, and the function is opposite while the pointer moves widdershins. 表中描述的开关功能是表示：仪表压力指针位于最小刻度值时所具有的开关功能，即压力指针从最小刻度值开始顺时针动时的开关状态，当压力指针逆时针转动时，实现的开关功能相反。
