retrace one's steps是什么意思

retrace one's steps 原路折回 retrace one's steps 走回头路; 双语例句 1 In the pages that follow, you will retrace Hubble's steps to make one of the most important discoveries of 20th century astronomy. 下面，你将沿着哈勃的脚印得出20世纪天文学最重要的发现。