x

• The function n(x, y)is known as the refractive index profile .
  函数n（x，y）称为折射率分布。
• A stationary state shows a spread of possible value for x .
  一个定态表明有一个X可能值的展宽。
• This gives the following on grouping like coefficients of x .
  这样得出下面像x的系数一样数组。
• Two perpendicular lines are chosen as the x and y coordinate axes .
  选两条垂线作为x和y坐标轴。
• 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。
• The equation in terms of x and y can be obtained by eliminating t .
  消去t，可以得到用x和y表示的方程。
• Human x and y chromosomes behave differently from the autosomes .
  人的X和Y染色体跟常染色体有不同的活动。
• The highest power of x which occurs in p is called the degree of p .
  出现在P中的X的最高次幂叫做P的次数。
• The resultant flow out of x is equal to the resultant flow into y .
  流出X的合成流量等于流进Y的合成流量。
• The reflected wavefront arrives at the point x at time t=(2l－x)/c .
  反射波前在t2Lxc时到达X点。