资料来源 : pyDict

焦点,关注重点

资料来源 : WordNet®

focal point
     n 1: a point of convergence of light (or other radiation) or a
          point from which it diverges [syn: {focus}]
     2: a central point or locus of an infection in an organism;
        "the focus of infection" [syn: {focus}, {nidus}]