Definition
To behave very well, especially used to describe a child.
（儿童）很乖，很听话
He has been as good as gold today since I told him I’d take him to the park if he behaved well.
自从我告诉他如果表现好就带他去公园，他今天一直都非常乖巧。
The children were as good as gold throughout the entire trip, with no complaints.
孩子们在整个旅程中都表现得非常乖巧，没有任何抱怨。
Despite usually being mischievous, he was as good as gold tonight.
尽管平时很调皮，他今晚却非常乖巧。