go ahead
1 to travel in front of other people in your group and arrive before them 走在前面; 先走
2 to happen; to be done 发生; 进行
go-ahead
1 noun permission for sb to start doing sth 批准; 许可
2 adjective willing to try new ideas, methods, etc. and therefore likely to succeed 有进取心的; 有开拓精神的
