A constant, variable, function name, or expression.
一种常数、变量、函数名或表达式。
Otherwise, if the expression is not a constant, another macro function is called to round up the value to a power of two.
如果表达式不是常量，就调用另一个宏函数把值向上取整到2的幂。
Any constant, built-in function, or mathematical expression can be used, except those that contain alias data types.
除了那些包含别名数据类型的表达式，可以使用任何常量、内置函数或数学表达式。
The obtained expression indicates that in the general condition the coupling coefficient is not a constant, but is a function associated with the travelling distances of the waves.
所得结果表明，在一般情况下耦合系数并非是常数，而是与波的传播距离有关的函数。
The obtained expression indicates that in the general condition the coupling coefficient is not a constant, but is a function associated with the travelling distances of the waves.
所得结果表明，在一般情况下耦合系数并非是常数，而是与波的传播距离有关的函数。
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