I had fallen so far behind that it seemed pointless trying to catch up.

我落后太多，似乎追赶下去也毫无意义。

《牛津词典》

Thousands of people could die because the relief effort has fallen so far behind.

成千上万的人可能会因救援跟不上而死去。

《柯林斯英汉双解大词典》

Are the poor really falling so far behind?

穷人真的落后的那么远吗？

youdao

So the major controversy behind stem cell research, at least as far as I understand it,

干细胞研究背后的主要争议，就我的理解来说，

干细胞和伦理 - SpeakingMax英语口语达人

If Spain is touched, Italy is sure to follow and France may not be so far behind.

ECONOMIST: Charlemagne

The opinion polls suggest that his government has fallen so far behind Labor that it would probably lose one now.

ECONOMIST: Australia

We invented the auto industry and the fact that we have fallen so far behind is something that we have to work on.

CNN: McCain, Obama go head to head in last debate