In a more formal definition, topic specialization starts with the containing element and works from the top down.

在更正式的定义中，主题专门化从包含元素开始，自顶向下工作。

youdao

Since any given element is contained within the start and end tag of its containing element, the structure has to form a tree.

由于任何给定元素都包含在包容它的元素的开始与结束标记之内，因此该结构必然为树型。

youdao

If you bind to element data, it should be the parent element of the target element; if you bind to attribute data, it should be the containing element.

如果绑定到元素数据，它就应该是目标元素的父元素；如果绑定到属性数据，它就应该是包含这个属性的元素。

youdao

IAEA-led team was fanning out in western Georgia in search of the remaining two of a batch of eight abandoned devices containing strontium-90, another radioactive element, which had been used in generators for communication stations.

ECONOMIST: How dirty bombs are made, and what they can do