optimistic是什么意思
optimistic[英][ˌɒptɪˈmɪstɪk][美][ˌɑ:ptɪˈmɪstɪk]adj.乐观的，乐观主义的; 双语例句 1The cricket team and its blindly optimistic supporters板球队及其盲目乐观的支持者 2And while investors seem optimistic, it 's far from clear if moviegoers will buy into its new approach...