vectors

• The radius vector of each solid is always a positive length .
  每个立体的矢径总是正值长度。
• A vector is defined by a direction as well as a magnitude .
  一个矢量要用大小和方向来表示。
• The divergence of a vector function is the scalar function .
  矢量函数的散度是一个标量函数。
• It should be clear that vector addition is commutative .
  可清楚地看到，矢量加法满足对易律。
• Isospin is a vector quantity .
  同位旋是矢量。
• Pollen vectors among animals are apes, lemurs, indian bears .
  动物中传粉媒介有猿、狐猿、印度熊。
• Neither vector nor reservoir has been discovered and proved .
  媒介和贮主至今都没曾得到发现和证实。
• A matrix consisting of one column or one row is known as a vector .
  由一列或一行构成的矩阵通称为向量。
• Vector is a useless survival, or offshoot from quaternions .
  向量是无用的幸存物或四元数的无价值的支流。
• A couple consisting of only two vectors is called a simple couple .
  仅由两个矢量组成的力偶叫作简单力偶。