x

• She x-ed out most of what she had written .
  她用x记号划掉了已经写出的大部分文字。
• The real numbers are called the barycentric coordinates of x .
  实数称为X重心坐标。
• We can construct many functions by assuming x=y .
  我们可通过假设xy组成许多函数。
• Allow me to present mr. x to you .
  让我给你介绍X先生。
• Every open covering of x has a finite sub-covering .
  每个开覆盖都有一个有限子覆盖。
• In particular, x must be zero on the wall of the box .
  具体地说，箱壁上的X必须为零。
• We read a x b as "a cross b".
  AXB读作“A叉乘B”。
• This can be extended to n x n tridiagonal matrices.
  这可以推广到nXn三对角线的矩阵。
• The coordinates x, y, and z are called the relative coordinates .
  坐标x，y和z叫做相对坐标。
• The associated topology is the constructible topology on x .
  相应的拓扑是X之上的可构造拓扑。