retro-pref.(前缀)Backward; back:向后;后面:例句:retrorocket.减速火箭Situated behind:处于后部:例句:retrolental.在透镜后边的来源:Latin retrô- 拉丁语 retrô- from retrô [backward, behind] * see re- 源自 retrô [向后,在…之后] *参见 re-