it is difficult for us to learn a lesson in life____we've ac

it is difficult for us to learn a lesson in life____we've ac It's difficult for us to learn a lesson in life____ we've ac it is difficult for us to learn a lesson in life until we've it is difficult for us to learn a lesson in life _____ we've It is difficult for us to learn a lesson in life()we've actu It's very difficult for us to learn a lesson in life__we've it is difficult for us to learn a lesson in life we have act It is difficult for us to learn a lesson in life until we ha 英语翻译It's difficult for us to learn a lesson in life until we ( ) It's difficult for us to learn a lesson in li t is difficult for us to learn a lesson in life ____we have It is difficult for us to learn a learn in life ___we have a