1. Intussusception is a medical condition where one part of the intestine slides into another part, often leading to obstruction.
（内套病是一种医学情况，其中肠的一部分滑入另一部分，常常导致梗阻。）
2. The symptoms of introsusception in children may include abdominal pain, vomiting, and bloody stool.
（儿童内套病的症状可能包括腹痛、呕吐和带血便。）