defining

• Potential is defined relative to an arbitrary datum .
  势是相对于任意参考面而定义的。
• Their role in soil has not been defined adequately .
  它们在土壤中的作用还未充分肯定。
• We first define two terms .
  我们首先定义两个名词。
• The powers of the police need to be clearly defined .
  必须对警方的权限作出明确的规定。
• Motion may be defined as a continuous change of position .
  运动可以定义为位置的连续变化。
• 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 section defines the extent of application of the act .
  该条款用来限定该法令的适用范围。
• The two cleaved facets define the fabry-perot cavity .
  这两个解理面限定了法布里珀罗光腔。
• The trigonometric functions are defined for right triangles .
  三角函数是对直角三角形定义的。
• Analogous coefficients are usually defined for the lift .
  对于浮托力一般也能定义类似的系数。