noun 下载 🔗分享 十二指肠 The first part of the small intestine, starting at the lower end of the stomach and extending to the jejunum. Examples : "The doctor examined the patient's duodenum to see if any ulcers were present in the first part of the small intestine. " 医生检查了病人的十二指肠,看看小肠的起始部分是否有溃疡。 anatomy organ body medicine physiology part 与AI对话词汇游戏阅读练习