y

• Product y is more trouble-free than x .
  产品Y比产品X的问题要少。
• The product is the inner product of x and y .
  这个乘积是向量x与y的内积。
• Adjoin two new vertices x and y to n .
  在N中添加两个新顶点X和Y。
• We can construct many functions by assuming x=y .
  我们可通过假设xy组成许多函数。
• New york is abbreviated to n. y .
  NewYork缩写为N。
• Place y equal to the function .
  使y等于此函数。
• There is no harm in multiplying it by the constant 1/(1-y) .
  乘以常数1（1-y）没有妨碍。
• The coordinates x, y, and z are called the relative coordinates .
  坐标x，y和z叫做相对坐标。
• 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 trick is to consider various fixed y≠0.
  技巧就是考虑各个固定的y0。