常見例句A bacterium is identified as the cause for his duodenal ulcer.一種細(xì)菌被斷定爲(wèi)造成他十二指腸潰瘍的根源。A positive diagnosis can be made only after ruling out gastric and duodenal ulcer.衹有排除了胃潰瘍和十二指腸潰瘍的可能性之後，才能作出明確診斷。 返回 ulcered