边界

• The terminator is the boundary between day and night .
  地影界线就是白天和黑夜的边界。
• Two boundary conditions are needed to solve the equation .
  解此方程式需要两个边界条件。
• The king maintained order within the bound of his realm .
  国王在王国边界之内维持着秩序。
• Boundary friction is independent of the guide material used .
  边界摩擦与导纱杆材料质地无关。
• The immediate orchard boundary should consist of a fire-break .
  紧靠种子园边界应设有防火线。
• The arctic circle is the boundary of this region of darkness .
  北极圈就是这一黑暗地带的边界。
• Sharp grade cutoffs are the rule at margins of orebodies .
  品位的急剧下降是矿体边界上的规律。
• The border between china and korea has been formally delimited .
  中国与朝鲜的边界已正式划定了。
• By reflection we have added another boundary condition .
  通过镜像法我们就得到了另一个边界条件。
• Sharply outlined dikes, sills and bosses occur in numbers .
  边界清楚的岩脉，岩床及岩瘤等都常见。