函数

• The function n(x, y)is known as the refractive index profile .
  函数n（x，y）称为折射率分布。
• The values of this function elsewhere are of no consequence .
  这个函数值在别处是无关紧要的。
• This function describes the envelope of the displacement curve .
  这函数描绘出位移曲线的包络。
• In a nonautonomous system, f is explicitly a function of t .
  在非自主的系统中，f是t的显函数。
• The displacement function must not have any preferred direction .
  位移函数不准有任何优先用法。
• The idea of a function is the most important concept in mathematics .
  函数是数学中最重要的概念。
• The number a is called a double root of the polynomial function f .
  数a称为多项式函数f的二重根。
• The stress-relaxation modulus is a continuous, decreasing function .
  应力松驰量为连续衰减的函数。
• Another meaning can be attributed to the function u(x, t) .
  还可以赋于函数U（x，t）以另一种意义。
• Argument is a term that denotes what a function is a function of .
  自变量指的是函数所作用的对象。