词汇	sporadic occurrence
释义	sporadic occurrence 散发发病
随便看	infectious pustular vaginitis infectious pustular vulvovaginitis infectious pustular vulvovaginitisipv infectious pustular vulvovaginitis virus infectious rate infectious resource Infectious respiratoy disease infectious reticuloendotheliosis infectious rhinitis infectious rhinitis of chicken infectious rhinotracheitis infectious rhinotracheitis of cattle infectious rna infectious RNA infectious room infectious root canal Infectious secondary iridocyclitis infectious serositis infectious serositis of duck infectious serpent ulcer of cornea infectious serusitis of duck infectious shock Infect ious shock infectious sinusitis infectious sinusitis of turkeys