椭圆

• The particle motion is elliptical retrograde in contrast to elliptical direct orbit for surface waves on water .
  质点的运动是椭圆倒转，而不是象水上的面波那样的椭圆正转。
• Because of the ellipticity of the earth's orbit the solar radiation incident on the earth is about 7% greater in december than in june .
  因为地球轨道是椭圆，入射到地球上的太阳辐射在12月份约比6月份多7。
• Many engineering pairs such as the wheel-and-rail combination described in section 8. 2. 1 generate elliptical contact areas .
  工程上的许多运动组合，诸如821节中所描述的车轮与钢轨组合，都产生椭圆接触面。
• Second, since the radius vectors r to the extreme points of the ellipse satisfy(5. 3-12)they are parallel to the two allowed d vectors .
  其次，因为到椭圆极值点的径向矢量r满足式（53-12），故这两个径向矢量与两个允许的D矢量平行。
• A liouville theorem for a class of elliptic systems
  一类椭圆型方程组的刘维尔定理
• Dished ends . ellipsoidal dished ends . dimensions
  盘形接头.椭圆的盘形接头.尺寸
• Structure that defines the boundaries of the ellipse
  结构，它定义椭圆的边界。
• Milling an elliptical - axis on nc lathe center
  在车削加工中心实现椭圆轴的铣削加工
• Discuss the elliptic curve cryptosystems mainly
  主要讨论椭圆曲线公钥密码体制。
• Adds three lines , a rectangle , and an ellipse
  添加三段直线、一个矩形和一个椭圆。