All of this is deep reason for concern.

所有这些都构成了担忧的深层理由。

youdao

There must be some very deep reason for this.

此事肯定有某种深层的原因。

youdao

Sorting turns out to be at the heart of many performance challenges for a deep reason.

结果证明，由于深层次的原因，排序是许多性能难题的核心所在。

youdao

So I wrote my dissertation on Byron as a result of that-- nothing complicated, no deep reason for doing these things.

所以我论文写的就是关于拜伦的-,没有太多的考虑，就是因为我喜欢。

耶鲁公开课 - 文学理论导论课程节选

The other really deep reason is the underlying rate of economic change.

FORBES: The Deeper Roots Of Economic Anxiety

But the real reason, when we look deep down inside, the reason why you are so popular among many Koreans is because everyone, including myself, are deeply impressed by your endless passion for learning and that this is very much a -- very much reflected in your life story.

WHITEHOUSE: President Obama Toasts President Lee Myung-Bak of the Republic of Korea | The White House

One reason for the deep-rooted public mistrust which, until now, has blocked privatisation in Ecuador is that some of privatisation's political backers have a long history of using public policies to promote private interests.

ECONOMIST: The slow road to reform