at its heart

基本解释

At its heart, that's really all there is to both specifications -- let's now walk through an example to fully demonstrate how it works.
在其核心处，几乎包含了全部两个规范 -- 让我们讨论一个实例来整体论证一下它是如何工作的。
The World Trade Organization (WTO) is the only international body dealing with the rules of trade between nations. At its heart are the WTO agreements.
世界贸易组织是世界上独一无二的处理国家之间贸易规则的世界性组织，其核心是世贸协议。
From an outside point of view many a foreign custom would appear to have gained entry into our family, but at its heart flames a national pride which has never flickered.
表面上看起来，我们的家庭里似乎移入了许多外国风俗，但是在它的心中，闪耀着永不摇曳的民族自豪的火炬。

"We will rebuild this economy stronger than before,and at its heart will be three powerful words: Made In America."
But a framework in which to understand it is that pro-slavery ideology was, at its heart, a kind of deeply conservative, organic worldview.
支撑奴隶制度思想体系的框架,若要去理解这副框架的话,其核心,是某种极度传统,接近自然的世界观
耶鲁公开课 - 美国内战与重建课程节选
One was coming at me with a huge spear, with its sharp tip pointed at my heart!

At its heart, the book takes the characteristics of elements and maps them to human traits.
FORBES: Bunpei Yorifuji's Quirky Guide To The Periodic Table