d

• Equation 13. 3-9 is of the van der pol form .
  133-9式具有范德波尔形式。
• The boundary homorphism d is defined as follows .
  边缘同态d按以下方式来定义。
• D is called the domain and its elements are places .
  D称为域，而它的元素称为位。
• This relationship will be the object of section d .
  该相互关系将是D节讨论的主题。
• We now write two equilibrium equations for joint d .
  现在列出节点D的两个平衡方程。
• The equivalent loading is shown in fig. 1-24(d) .
  图1-24（d）则表示出了相应的载荷。
• The molecules are held together by van der waals forces .
  分子是由范德华力约束在一起的。
• The torque applied to the whole assembly was measured at d .
  整个组件所受的转矩可在D上测出。
• 4 gradient arrays marked a, b, c and d were set up .
  布置了编号为A，B，C，D的四个梯度排列。
• Infants are particularly susceptible to vitamin d intoxication .
  婴儿尤其容易引起维生素D中毒。