围绕物
6.A length, as of rope, required to make one complete turn around something.
8.Granulomas caused by Mycobacterium tuberculosis and by pathogenic fungi such as Histoplasma capsulatum or Cryptococcus neoformans are often caseating. Here, the area of caseation is seen at the upper right.
9.To enclose(a polygon or polyhedron) within a configuration of lines, curves, or surfaces so that every vertex of the enclosed object is incident on the enclosing configuration.
10.A faintly colored luminous ring appearing to surround a celestial body visible through a haze or thin cloud, especially such a ring around the moon or sun, caused by diffraction of light from suspended matter in the intervening medium.
