大病的英文：
a serious illness; a serious disease; a severe disease

参考例句：
  • Comprehensive arrangement for serious disease
    大病统筹
  • an exhaustive siege of illness
    一场耗蚀体力的大病
  • Not long ago, he was seriously ill.
    前不久，他害了一场大病。
  • “She’s not very ill any more. Console yourself”
    “她已没有什么大病，你请放心吧。”
  • His poor sight is a hangover from a bad illness he had
    他视力不好是他生了一场大病留下的后遗症。
serious是什么意思：
adj. 严肃的，认真的；严重的；危急的；重要的；庄重的
  • It is a serious article.
    这是一篇发人深省的文章。
  • do not deny that is a serious blow.
    我不否认那是严重的一击。
  • It is a job requiring serious application.
    这是一项需要非常勤奋的工作。
illness是什么意思：
n. 疾病
  • Many people are immobilized by the illness.
    许多患上这种病的人都瘫痪了。
  • It becomes ill you to do so.
    你这样做是挺不合适的。
  • They bear you no ill will.
    他们对你并无恶意。
disease是什么意思：
n. 疾病，不健全，病害，弊病，烦恼
v. 使有病，使不健全
  • Surgical disease, or the surgical response to disease is of similar antiquity.
    外科疾病或对疾病的外科处理的历史同样久远。
  • Some diseases are presented by heredity.
    有些疾病是由于遗传导致的。
  • ear bacterial disease of maize
    玉米穗细菌病

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