1. physics of earthquake foci 
   震源物理
2. environmental pollution and chromosomal aberration 
   环境污染与染色体畸变
3. (optics) having two foci. 
   （光学）有两个焦点。
4. an organism that has characteristics resulting from chromosomal alteration. 
   染色体变异的生物体。
5. Having the same focus or foci. Used of a lens. 
   共焦的有共同焦点的。用于透镜

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