When looking back on my college years, I have a feeling to cry.

一位即将毕业的大学生在给老师的信中写道：回想大学生活，我想哭。

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When looking back, we are happy to see we have come a long way and finally succeeded in securing the transaction.

回顾过去，我们高兴地看到经过漫长的道路我们最终达成交易。

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After many years, when looking back to the past, you will not forget the time when you went go to great lengths striving for your dream.

多年以后的多年以后，如果还可以偶然记起，请别忘了为了梦想努力奋斗的那些美好时光。

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Faulkner has been accused of looking back to a time when life was better.

VOA: special.2010.01.03

And then I could put a couple of plates and I could raster the beam so that when I am looking here,the beam goes back and forth about 80 times a second.

然后我放了两个感光片,我可以检测到光束所以,当我观察时,电子束以每秒80次的速度来来回回了。

麻省理工公开课 - 固态化学导论课程节选

When I am looking at that wall, its photons are hitting the wall and coming back to me.

当我盯着墙看的时候，光子撞击墙面,又回到我眼中来。

麻省理工公开课 - 固态化学导论课程节选

When looking back at these numbers in five years, this could be considered fraudulent.

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Gou remained reserved when looking back on the decision.

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"But as a more mature writer, let me put it that way, when you start looking back on your life, it is easier to go back into the past and therefore, I was able to really put my head back into being a stutterer, which I wouldn't have been able to do otherwise, " he said.

CNN: Finding words for 'The King's Speech' took decades