1. physics of earthquake foci 
   震源物理
2. (optics) having two foci. 
   （光学）有两个焦点。
3. Having the same focus or foci. Used of a lens. 
   共焦的有共同焦点的。用于透镜
4. the longest axis of an ellipse or ellipsoid; passes through the two foci. 
   椭圆中较长的那个轴；穿过两个焦点的轴。
5. the sums of the distances from the foci to any point on an ellipse is constant. 
   椭圆规是构造椭圆的工具.。

查看更多例句 相关情景会话

• 1. 自然疫源地带
  water-borne transmission 经水传播Z...zone of natural foci 自然疫源地带
  gongjushu.cnki.net - 相关搜索