When you are running, look ahead, don't look back.

跑步时往前看，别后瞻。

youdao

Quit thinking that you have to make the right decision; instead, make a choice and don't look back.

不要再认为你必须做出正确的决定；相反，做出决定之后不要后悔。

youdao

Once you start, don't look back.

一旦开始流程后，就不要走回头路。

youdao

"As an athlete,you never really look at least I don't I don't look back at the past medals that I've won.

VOA: standard.2010.02.23

But things don't look as bad as they looked 3 or 5 years back.

但与3或5年前比起来,情况已经缓和很多。

普林斯顿公开课 - 国际座谈会课程节选

The man took the box again, and took another long look, and gave it back to Smiley,and says, "Well,I don't see anything about that frog that is any better than any other frog."

VOA: special.2009.08.29

He's telling voters, whatever you do don't look back at all those promises I made.

WSJ: Punctuation Nerds Stopped

If that's asking a bit much, just nab the X7i and don't look back.

ENGADGET: IRL: Klipsch Image X7i, Razer BlackShark and BlueAnt's Embrace headphones

But, no, we certainly don't look back and have any regrets about where we spent time or where we spent resources.

WHITEHOUSE: The White House