happy-go-lucky[英][ˌhæpi:gəʊˈlʌki:][美][ˌhæpiɡoˈlʌki]adj.逍遥的，随遇而安的; adv.完全偶然地; 例句:1.Part of the explanation lies in health behaviors--the cheerful, happy-go-lucky kids tendedto take more risks with their health across the years, friedman noted. 部分解释来自健康行为：那些快乐的无忧无虑的孩子在成长过程对待他们的健康常常会去冒险，friedman指出。 2.Yong jones is a happy-go-lucky lad; he doesn't worry almost anything. 年轻的琼斯是个乐天知命的小伙子，他什么事也不忧愁
