求翻译：　　放暑假了，每天晚饭后，爸爸带着我去跑步，从家里一直跑到和平大桥下。跑步时，爸爸告诉我，要抬头、挺胸，姿势正确，均匀呼吸。是什么意思？

　　The summer holidays, every day after dinner, my father took me to run, ran from home to peace under the bridge. When run, dad told me that you want to look up, arching, posture is correct, even breathing.