1.【数】运算域
1.a quantity, function, or other entity that is to have a mathematical operation performed on it
2.the portion of a computer instruction that specifies the location in memory of the data to be manipulated
1.Takes two operands: the left-hand operand is an object and the right is the name of a member of that object.
接受两个操作数：左操作数是一个对象，而右边是该对象的一个成员的名字。
2.Note that this does NOT change the types of the operands themselves; the only change is in how the operands are evaluated.
注意这并没有改变这些运算数本身的类型；改变的仅是这些运算数如何被求值。
3.The operands to the call operator are the name of the function and a (possibly empty) comma-separated list of arguments .
调用操作符的操作数是函数名和一组（有可能是空的）由逗号分隔的实参。
4.Do not provide operator overloads unless at least one of the operands is of the type defining the overload.
除非至少有一个操作数属于定义重载的类型，否则不要提供运算符重载。
5.If you want to force a floating-point result, be sure that at least one of the operands is a floating-point type.
如果要强制取得浮点结果，则必须确保操作数中至少有一个为浮点类型。
6.If one of the operands is of an integral type, then that operand is converted to the floating-point type of the other operand.
如果其中一个操作数为整数类型，那么该操作数将被转换为另一个操作数所属的浮点类型。
7.At least one of the operands of a binary operator.
二元运算符的至少一个操作数。
8.The result of an arithmetic operator is always nullable, even if the operands are nonnullable and ANSI_WARNINGS or ARITHABORT is set ON.
即使操作数不可为空并且ANSI_WARNINGS或ARITHABORT设置为ON，算术运算符的结果也始终可为空。
9.The value elements that are combined with an operator are called operands of that operator.
与运算符组合在一起的值元素称为该运算符的操作数。
10.These operators produce a null value if the operands are null; otherwise, the operator uses the contained value to calculate the result.
如果操作数为空，这些运算符将产生一个空值；否则运算符将使用包含的值来计算结果。