小孩懂事英语怎么说视频

小孩懂事英语可以用 "well-behaved child" 或 "well-mannered child" 来表示。这两个词都可以用来描述一个行为端正、遵守规则、有礼貌的小孩。
举个例子：
"My sister's children are always well-behaved when we go out to eat. They know how to use their manners and follow the rules."
"I was really impressed by how well-mannered your son was during the party. He always said 'please' and 'thank you' and was very polite to everyone."
来源：这两个词都是英语的常用词汇，并不是特定的术语。它们可以在日常的英语交流中经常使用。