阶

• It is only by first naming organisms and then grouping them in recognizable categories .
  只有先对有机体进行命名并把它们归类成可以认识的分类阶元。
• The higher modes have shorter periods than the fundamental mode and, moreover, they have higher velocities .
  高振型波比基阶振型波周期短，波速高。
• The foster wheeler reforming furnace is a terrace wall type featuring true radiant-wall design .
  福斯特惠勒转化炉是一个阶墙炉，是真正的辐射墙设计。
• Marcus tramped up the front steps and rang the door bell boldly, to show his independence .
  马革士踏上门前台阶，神气活现地按了按铃，一脸旁若无人的样子。
• An important case is the linear homogeneous second-order differential equation with constant coefficients .
  一种重要的情形是常系数二阶线性齐次微分方程。
• The compactness and utility of this notation becomes apparent when high order systems are considered .
  当研究高阶系统时，这种表示方法就显得很紧凑和有用。
• Except in the higher echelons, extensive classification has no place in the classification of vegetation .
  除高阶类级之外，外延分类在植物分类中还是没有地位的。
• The solution of the set of second-order linear differential equations (6.10) depends on the eigenvalues of a .
  二阶线性微分方程组（610）的解依赖于A的特征值。
• The two-moment description tells where the ions are located and roughly how broad the distribution is .
  二阶矩描述给出了离子的停止位置，并粗略地给出分布的宽度。
• The seaward margins of these benches are transitional and cannot be defined as easily as the landward margins .
  这些砂阶的向海一边是渐变的，而且不如向陆一侧那样易于确定。