相等

• Both single species and whole groups of species last for very unequal periods .
  单独的物种以及整个的物种群存续的时期极不相等。
• An equation is a statement of the equality between two equal numbers or number symbols .
  方程是表明两个相等的数或数的符号相等的式子。
• The criterion of equality of two quaternions is that their scalar parts shall be equal .
  两个四元数相等的准则是，它们的数量部分相等。
• The first snag occurs at some d that is preceded by an equal number of d's and h's .
  在某点D第一次出现困难，在其前面有相等个数的D和H。
• Desargues proved that the cross ratio is the same for every section of the projection .
  Desargues证明了投射线的每个截线上的交比都相等。
• Under these conditions the conservation of energy is equivalent to the conservation of mass .
  在这种条件下，能量守恒和质量守恒是相等的。
• He walked due south; when all directions are equal, a straight line is best .
  在四方距离相等的情况下，最好是走直线，因此他朝正南方向走去。
• Nominal diameter is the diameter of a sphere of the same volume as the given particle .
  “等容粒径”是某一球体直径，它与某已知的颗粒体积相等。
• One way to construct this line is by least square, weighting all points equally .
  办法之一是给予所有的点子以相等的权用最小二乘方法来画这条线。
• Finally, the positive column is reached where electrons and ions have equal densities .
  最后到达的区域是正柱区，这里，电子和离子具有相等的密度。